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Finding the Fourth Proportional to 964.62, 1,330.52 and 615.15

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Solution

The fourth proportional to 964.62, 1,330.52 and 615.15 is: 848.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.62 : 1,330.52 = 615.15 : x
  2. Step 2: Convert to fraction form
    964.62/1,330.52 = 615.15/x
  3. Step 3: Cross multiply
    964.62x = 1,330.52 × 615.15
  4. Step 4: Simplify right side
    964.62x = 818,466.30
  5. Step 5: Solve for x
    x = 818,466.30/964.62
  6. Step 6: Final answer
    x = 848.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.