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Finding the Fourth Proportional to 964.20, 1,444.70 and 906.60

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Solution

The fourth proportional to 964.20, 1,444.70 and 906.60 is: 1,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.20 : 1,444.70 = 906.60 : x
  2. Step 2: Convert to fraction form
    964.20/1,444.70 = 906.60/x
  3. Step 3: Cross multiply
    964.20x = 1,444.70 × 906.60
  4. Step 4: Simplify right side
    964.20x = 1,309,765.02
  5. Step 5: Solve for x
    x = 1,309,765.02/964.20
  6. Step 6: Final answer
    x = 1,358.40

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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.