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Finding the Fourth Proportional to 434,207.20, 651,310.80 and 256,914.40

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Solution

The fourth proportional to 434,207.20, 651,310.80 and 256,914.40 is: 385,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,207.20 : 651,310.80 = 256,914.40 : x
  2. Step 2: Convert to fraction form
    434,207.20/651,310.80 = 256,914.40/x
  3. Step 3: Cross multiply
    434,207.20x = 651,310.80 × 256,914.40
  4. Step 4: Simplify right side
    434,207.20x = 167,331,123,395.52
  5. Step 5: Solve for x
    x = 167,331,123,395.52/434,207.20
  6. Step 6: Final answer
    x = 385,371.60

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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.