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Finding the Fourth Proportional to 557.15, 763.88 and 547.28

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Solution

The fourth proportional to 557.15, 763.88 and 547.28 is: 750.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.15 : 763.88 = 547.28 : x
  2. Step 2: Convert to fraction form
    557.15/763.88 = 547.28/x
  3. Step 3: Cross multiply
    557.15x = 763.88 × 547.28
  4. Step 4: Simplify right side
    557.15x = 418,053.80
  5. Step 5: Solve for x
    x = 418,053.80/557.15
  6. Step 6: Final answer
    x = 750.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.