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Finding the Fourth Proportional to 954.30, 1,431.45 and 886.80

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Solution

The fourth proportional to 954.30, 1,431.45 and 886.80 is: 1,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.30 : 1,431.45 = 886.80 : x
  2. Step 2: Convert to fraction form
    954.30/1,431.45 = 886.80/x
  3. Step 3: Cross multiply
    954.30x = 1,431.45 × 886.80
  4. Step 4: Simplify right side
    954.30x = 1,269,409.86
  5. Step 5: Solve for x
    x = 1,269,409.86/954.30
  6. Step 6: Final answer
    x = 1,330.20

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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.