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Finding the Fourth Proportional to 956.70, 1,434.12 and 409.02

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Solution

The fourth proportional to 956.70, 1,434.12 and 409.02 is: 613.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.70 : 1,434.12 = 409.02 : x
  2. Step 2: Convert to fraction form
    956.70/1,434.12 = 409.02/x
  3. Step 3: Cross multiply
    956.70x = 1,434.12 × 409.02
  4. Step 4: Simplify right side
    956.70x = 586,583.76
  5. Step 5: Solve for x
    x = 586,583.76/956.70
  6. Step 6: Final answer
    x = 613.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.