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Finding the Fourth Proportional to 538,905.80, 808,358.70 and 326,329.40

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Solution

The fourth proportional to 538,905.80, 808,358.70 and 326,329.40 is: 489,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,905.80 : 808,358.70 = 326,329.40 : x
  2. Step 2: Convert to fraction form
    538,905.80/808,358.70 = 326,329.40/x
  3. Step 3: Cross multiply
    538,905.80x = 808,358.70 × 326,329.40
  4. Step 4: Simplify right side
    538,905.80x = 263,791,209,555.78
  5. Step 5: Solve for x
    x = 263,791,209,555.78/538,905.80
  6. Step 6: Final answer
    x = 489,494.10

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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.