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Finding the Fourth Proportional to 947.18, 1,306.68 and 554.04

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Solution

The fourth proportional to 947.18, 1,306.68 and 554.04 is: 764.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.18 : 1,306.68 = 554.04 : x
  2. Step 2: Convert to fraction form
    947.18/1,306.68 = 554.04/x
  3. Step 3: Cross multiply
    947.18x = 1,306.68 × 554.04
  4. Step 4: Simplify right side
    947.18x = 723,952.99
  5. Step 5: Solve for x
    x = 723,952.99/947.18
  6. Step 6: Final answer
    x = 764.32

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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.