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Finding the Fourth Proportional to 521,260.80, 781,737.60 and 205,612.80

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Solution

The fourth proportional to 521,260.80, 781,737.60 and 205,612.80 is: 308,358.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,260.80 : 781,737.60 = 205,612.80 : x
  2. Step 2: Convert to fraction form
    521,260.80/781,737.60 = 205,612.80/x
  3. Step 3: Cross multiply
    521,260.80x = 781,737.60 × 205,612.80
  4. Step 4: Simplify right side
    521,260.80x = 160,735,256,801.28
  5. Step 5: Solve for x
    x = 160,735,256,801.28/521,260.80
  6. Step 6: Final answer
    x = 308,358.61

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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.