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Finding the Fourth Proportional to 572.52, 790.56 and 398.28

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Solution

The fourth proportional to 572.52, 790.56 and 398.28 is: 549.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.52 : 790.56 = 398.28 : x
  2. Step 2: Convert to fraction form
    572.52/790.56 = 398.28/x
  3. Step 3: Cross multiply
    572.52x = 790.56 × 398.28
  4. Step 4: Simplify right side
    572.52x = 314,864.24
  5. Step 5: Solve for x
    x = 314,864.24/572.52
  6. Step 6: Final answer
    x = 549.96

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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.