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Finding the Fourth Proportional to 521.80, 720.48 and 472.48

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Solution

The fourth proportional to 521.80, 720.48 and 472.48 is: 652.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.80 : 720.48 = 472.48 : x
  2. Step 2: Convert to fraction form
    521.80/720.48 = 472.48/x
  3. Step 3: Cross multiply
    521.80x = 720.48 × 472.48
  4. Step 4: Simplify right side
    521.80x = 340,412.39
  5. Step 5: Solve for x
    x = 340,412.39/521.80
  6. Step 6: Final answer
    x = 652.38

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Find fourth proportional to 522.80, 721.86 and 473.48
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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.