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Finding the Fourth Proportional to 972.64, 1,342.26 and 530.56

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Solution

The fourth proportional to 972.64, 1,342.26 and 530.56 is: 732.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.64 : 1,342.26 = 530.56 : x
  2. Step 2: Convert to fraction form
    972.64/1,342.26 = 530.56/x
  3. Step 3: Cross multiply
    972.64x = 1,342.26 × 530.56
  4. Step 4: Simplify right side
    972.64x = 712,140.10
  5. Step 5: Solve for x
    x = 712,140.10/972.64
  6. Step 6: Final answer
    x = 732.18

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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.