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Finding the Fourth Proportional to 972.38, 1,341.89 and 530.31

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Solution

The fourth proportional to 972.38, 1,341.89 and 530.31 is: 731.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.38 : 1,341.89 = 530.31 : x
  2. Step 2: Convert to fraction form
    972.38/1,341.89 = 530.31/x
  3. Step 3: Cross multiply
    972.38x = 1,341.89 × 530.31
  4. Step 4: Simplify right side
    972.38x = 711,611.99
  5. Step 5: Solve for x
    x = 711,611.99/972.38
  6. Step 6: Final answer
    x = 731.82

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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.