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Finding the Fourth Proportional to 530.68, 731.16 and 397.30

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Solution

The fourth proportional to 530.68, 731.16 and 397.30 is: 547.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.68 : 731.16 = 397.30 : x
  2. Step 2: Convert to fraction form
    530.68/731.16 = 397.30/x
  3. Step 3: Cross multiply
    530.68x = 731.16 × 397.30
  4. Step 4: Simplify right side
    530.68x = 290,489.87
  5. Step 5: Solve for x
    x = 290,489.87/530.68
  6. Step 6: Final answer
    x = 547.39

Related Problems

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Double scale
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1.5x scale

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.