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Finding the Fourth Proportional to 954.62, 1,431.95 and 520.86

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Solution

The fourth proportional to 954.62, 1,431.95 and 520.86 is: 781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.62 : 1,431.95 = 520.86 : x
  2. Step 2: Convert to fraction form
    954.62/1,431.95 = 520.86/x
  3. Step 3: Cross multiply
    954.62x = 1,431.95 × 520.86
  4. Step 4: Simplify right side
    954.62x = 745,845.48
  5. Step 5: Solve for x
    x = 745,845.48/954.62
  6. Step 6: Final answer
    x = 781.30

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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.