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Finding the Fourth Proportional to 530.63, 732.09 and 320.87

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Solution

The fourth proportional to 530.63, 732.09 and 320.87 is: 442.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.63 : 732.09 = 320.87 : x
  2. Step 2: Convert to fraction form
    530.63/732.09 = 320.87/x
  3. Step 3: Cross multiply
    530.63x = 732.09 × 320.87
  4. Step 4: Simplify right side
    530.63x = 234,902.06
  5. Step 5: Solve for x
    x = 234,902.06/530.63
  6. Step 6: Final answer
    x = 442.69

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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.