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Finding the Fourth Proportional to 508,733.80, 763,100.70 and 390,999.40

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Solution

The fourth proportional to 508,733.80, 763,100.70 and 390,999.40 is: 586,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,733.80 : 763,100.70 = 390,999.40 : x
  2. Step 2: Convert to fraction form
    508,733.80/763,100.70 = 390,999.40/x
  3. Step 3: Cross multiply
    508,733.80x = 763,100.70 × 390,999.40
  4. Step 4: Simplify right side
    508,733.80x = 298,371,915,839.58
  5. Step 5: Solve for x
    x = 298,371,915,839.58/508,733.80
  6. Step 6: Final answer
    x = 586,499.10

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.