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Finding the Fourth Proportional to 972.48, 1,342.04 and 530.40

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Solution

The fourth proportional to 972.48, 1,342.04 and 530.40 is: 731.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.48 : 1,342.04 = 530.40 : x
  2. Step 2: Convert to fraction form
    972.48/1,342.04 = 530.40/x
  3. Step 3: Cross multiply
    972.48x = 1,342.04 × 530.40
  4. Step 4: Simplify right side
    972.48x = 711,818.02
  5. Step 5: Solve for x
    x = 711,818.02/972.48
  6. Step 6: Final answer
    x = 731.96

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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.