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Finding the Fourth Proportional to 387,319.40, 580,979.10 and 246,660.20

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Solution

The fourth proportional to 387,319.40, 580,979.10 and 246,660.20 is: 369,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,319.40 : 580,979.10 = 246,660.20 : x
  2. Step 2: Convert to fraction form
    387,319.40/580,979.10 = 246,660.20/x
  3. Step 3: Cross multiply
    387,319.40x = 580,979.10 × 246,660.20
  4. Step 4: Simplify right side
    387,319.40x = 143,304,421,001.82
  5. Step 5: Solve for x
    x = 143,304,421,001.82/387,319.40
  6. Step 6: Final answer
    x = 369,990.30

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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.