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Finding the Fourth Proportional to 954.60, 1,431.09 and 521.34

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Solution

The fourth proportional to 954.60, 1,431.09 and 521.34 is: 781.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.60 : 1,431.09 = 521.34 : x
  2. Step 2: Convert to fraction form
    954.60/1,431.09 = 521.34/x
  3. Step 3: Cross multiply
    954.60x = 1,431.09 × 521.34
  4. Step 4: Simplify right side
    954.60x = 746,084.46
  5. Step 5: Solve for x
    x = 746,084.46/954.60
  6. Step 6: Final answer
    x = 781.57

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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.