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Finding the Fourth Proportional to 387,211.20, 580,816.80 and 102,901.20

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Solution

The fourth proportional to 387,211.20, 580,816.80 and 102,901.20 is: 154,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,211.20 : 580,816.80 = 102,901.20 : x
  2. Step 2: Convert to fraction form
    387,211.20/580,816.80 = 102,901.20/x
  3. Step 3: Cross multiply
    387,211.20x = 580,816.80 × 102,901.20
  4. Step 4: Simplify right side
    387,211.20x = 59,766,745,700.16
  5. Step 5: Solve for x
    x = 59,766,745,700.16/387,211.20
  6. Step 6: Final answer
    x = 154,351.80

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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.