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Finding the Fourth Proportional to 508,911.60, 763,367.40 and 260,079.60

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Solution

The fourth proportional to 508,911.60, 763,367.40 and 260,079.60 is: 390,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,911.60 : 763,367.40 = 260,079.60 : x
  2. Step 2: Convert to fraction form
    508,911.60/763,367.40 = 260,079.60/x
  3. Step 3: Cross multiply
    508,911.60x = 763,367.40 × 260,079.60
  4. Step 4: Simplify right side
    508,911.60x = 198,536,288,045.04
  5. Step 5: Solve for x
    x = 198,536,288,045.04/508,911.60
  6. Step 6: Final answer
    x = 390,119.40

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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.