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Finding the Fourth Proportional to 1,687,721.76, 2,531,260.08 and 505,769.76

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Solution

The fourth proportional to 1,687,721.76, 2,531,260.08 and 505,769.76 is: 758,557.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687,721.76 : 2,531,260.08 = 505,769.76 : x
  2. Step 2: Convert to fraction form
    1,687,721.76/2,531,260.08 = 505,769.76/x
  3. Step 3: Cross multiply
    1,687,721.76x = 2,531,260.08 × 505,769.76
  4. Step 4: Simplify right side
    1,687,721.76x = 1,280,234,803,159.18
  5. Step 5: Solve for x
    x = 1,280,234,803,159.18/1,687,721.76
  6. Step 6: Final answer
    x = 758,557.98

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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.