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Finding the Fourth Proportional to 972.76, 1,342.45 and 530.69

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Solution

The fourth proportional to 972.76, 1,342.45 and 530.69 is: 732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.76 : 1,342.45 = 530.69 : x
  2. Step 2: Convert to fraction form
    972.76/1,342.45 = 530.69/x
  3. Step 3: Cross multiply
    972.76x = 1,342.45 × 530.69
  4. Step 4: Simplify right side
    972.76x = 712,419.53
  5. Step 5: Solve for x
    x = 712,419.53/972.76
  6. Step 6: Final answer
    x = 732.37

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Double scale
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1.5x scale

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.