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Finding the Fourth Proportional to 530.19, 731.67 and 309.27

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Solution

The fourth proportional to 530.19, 731.67 and 309.27 is: 426.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.19 : 731.67 = 309.27 : x
  2. Step 2: Convert to fraction form
    530.19/731.67 = 309.27/x
  3. Step 3: Cross multiply
    530.19x = 731.67 × 309.27
  4. Step 4: Simplify right side
    530.19x = 226,285.16
  5. Step 5: Solve for x
    x = 226,285.16/530.19
  6. Step 6: Final answer
    x = 426.80

Related Problems

Find fourth proportional to 265.10, 365.83 and 154.64
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Double scale
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Similar ratio
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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.