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Finding the Fourth Proportional to 530.68, 732.38 and 309.70

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Solution

The fourth proportional to 530.68, 732.38 and 309.70 is: 427.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.68 : 732.38 = 309.70 : x
  2. Step 2: Convert to fraction form
    530.68/732.38 = 309.70/x
  3. Step 3: Cross multiply
    530.68x = 732.38 × 309.70
  4. Step 4: Simplify right side
    530.68x = 226,818.09
  5. Step 5: Solve for x
    x = 226,818.09/530.68
  6. Step 6: Final answer
    x = 427.41

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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.