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Finding the Fourth Proportional to 654.14, 980.91 and 615.87

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Solution

The fourth proportional to 654.14, 980.91 and 615.87 is: 923.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.14 : 980.91 = 615.87 : x
  2. Step 2: Convert to fraction form
    654.14/980.91 = 615.87/x
  3. Step 3: Cross multiply
    654.14x = 980.91 × 615.87
  4. Step 4: Simplify right side
    654.14x = 604,113.04
  5. Step 5: Solve for x
    x = 604,113.04/654.14
  6. Step 6: Final answer
    x = 923.52

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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.