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Finding the Fourth Proportional to 530.19, 730.74 and 398.97

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Solution

The fourth proportional to 530.19, 730.74 and 398.97 is: 549.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.19 : 730.74 = 398.97 : x
  2. Step 2: Convert to fraction form
    530.19/730.74 = 398.97/x
  3. Step 3: Cross multiply
    530.19x = 730.74 × 398.97
  4. Step 4: Simplify right side
    530.19x = 291,543.34
  5. Step 5: Solve for x
    x = 291,543.34/530.19
  6. Step 6: Final answer
    x = 549.88

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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.