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Finding the Fourth Proportional to 964.88, 1,331.04 and 615.20

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Solution

The fourth proportional to 964.88, 1,331.04 and 615.20 is: 848.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.88 : 1,331.04 = 615.20 : x
  2. Step 2: Convert to fraction form
    964.88/1,331.04 = 615.20/x
  3. Step 3: Cross multiply
    964.88x = 1,331.04 × 615.20
  4. Step 4: Simplify right side
    964.88x = 818,855.81
  5. Step 5: Solve for x
    x = 818,855.81/964.88
  6. Step 6: Final answer
    x = 848.66

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