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Finding the Fourth Proportional to 718.12, 1,077.26 and 307.17

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Solution

The fourth proportional to 718.12, 1,077.26 and 307.17 is: 460.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.12 : 1,077.26 = 307.17 : x
  2. Step 2: Convert to fraction form
    718.12/1,077.26 = 307.17/x
  3. Step 3: Cross multiply
    718.12x = 1,077.26 × 307.17
  4. Step 4: Simplify right side
    718.12x = 330,897.73
  5. Step 5: Solve for x
    x = 330,897.73/718.12
  6. Step 6: Final answer
    x = 460.78

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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.