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Finding the Fourth Proportional to 1,048.47, 1,572.87 and 355.22

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Solution

The fourth proportional to 1,048.47, 1,572.87 and 355.22 is: 532.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.47 : 1,572.87 = 355.22 : x
  2. Step 2: Convert to fraction form
    1,048.47/1,572.87 = 355.22/x
  3. Step 3: Cross multiply
    1,048.47x = 1,572.87 × 355.22
  4. Step 4: Simplify right side
    1,048.47x = 558,711.18
  5. Step 5: Solve for x
    x = 558,711.18/1,048.47
  6. Step 6: Final answer
    x = 532.88

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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.