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Finding the Fourth Proportional to 954.55, 1,429.96 and 851.35

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Solution

The fourth proportional to 954.55, 1,429.96 and 851.35 is: 1,275.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.55 : 1,429.96 = 851.35 : x
  2. Step 2: Convert to fraction form
    954.55/1,429.96 = 851.35/x
  3. Step 3: Cross multiply
    954.55x = 1,429.96 × 851.35
  4. Step 4: Simplify right side
    954.55x = 1,217,396.45
  5. Step 5: Solve for x
    x = 1,217,396.45/954.55
  6. Step 6: Final answer
    x = 1,275.36

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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.