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Finding the Fourth Proportional to 1,068.72, 1,600.10 and 807.92

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Solution

The fourth proportional to 1,068.72, 1,600.10 and 807.92 is: 1,209.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.72 : 1,600.10 = 807.92 : x
  2. Step 2: Convert to fraction form
    1,068.72/1,600.10 = 807.92/x
  3. Step 3: Cross multiply
    1,068.72x = 1,600.10 × 807.92
  4. Step 4: Simplify right side
    1,068.72x = 1,292,752.79
  5. Step 5: Solve for x
    x = 1,292,752.79/1,068.72
  6. Step 6: Final answer
    x = 1,209.63

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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.