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Finding the Fourth Proportional to 517,937.20, 776,905.80 and 307,812.40

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Solution

The fourth proportional to 517,937.20, 776,905.80 and 307,812.40 is: 461,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,937.20 : 776,905.80 = 307,812.40 : x
  2. Step 2: Convert to fraction form
    517,937.20/776,905.80 = 307,812.40/x
  3. Step 3: Cross multiply
    517,937.20x = 776,905.80 × 307,812.40
  4. Step 4: Simplify right side
    517,937.20x = 239,141,238,871.92
  5. Step 5: Solve for x
    x = 239,141,238,871.92/517,937.20
  6. Step 6: Final answer
    x = 461,718.60

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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.