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Finding the Fourth Proportional to 1,472.39, 2,031.93 and 809.26

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Solution

The fourth proportional to 1,472.39, 2,031.93 and 809.26 is: 1,116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.39 : 2,031.93 = 809.26 : x
  2. Step 2: Convert to fraction form
    1,472.39/2,031.93 = 809.26/x
  3. Step 3: Cross multiply
    1,472.39x = 2,031.93 × 809.26
  4. Step 4: Simplify right side
    1,472.39x = 1,644,356.62
  5. Step 5: Solve for x
    x = 1,644,356.62/1,472.39
  6. Step 6: Final answer
    x = 1,116.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.