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Finding the Fourth Proportional to 530.01, 732.56 and 398.79

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Solution

The fourth proportional to 530.01, 732.56 and 398.79 is: 551.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.01 : 732.56 = 398.79 : x
  2. Step 2: Convert to fraction form
    530.01/732.56 = 398.79/x
  3. Step 3: Cross multiply
    530.01x = 732.56 × 398.79
  4. Step 4: Simplify right side
    530.01x = 292,137.60
  5. Step 5: Solve for x
    x = 292,137.60/530.01
  6. Step 6: Final answer
    x = 551.19

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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.