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Finding the Fourth Proportional to 947.88, 1,308.16 and 549.69

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Solution

The fourth proportional to 947.88, 1,308.16 and 549.69 is: 758.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.88 : 1,308.16 = 549.69 : x
  2. Step 2: Convert to fraction form
    947.88/1,308.16 = 549.69/x
  3. Step 3: Cross multiply
    947.88x = 1,308.16 × 549.69
  4. Step 4: Simplify right side
    947.88x = 719,081.10
  5. Step 5: Solve for x
    x = 719,081.10/947.88
  6. Step 6: Final answer
    x = 758.62

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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.