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Finding the Fourth Proportional to 717.89, 1,077.17 and 307.08

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Solution

The fourth proportional to 717.89, 1,077.17 and 307.08 is: 460.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.89 : 1,077.17 = 307.08 : x
  2. Step 2: Convert to fraction form
    717.89/1,077.17 = 307.08/x
  3. Step 3: Cross multiply
    717.89x = 1,077.17 × 307.08
  4. Step 4: Simplify right side
    717.89x = 330,775.83
  5. Step 5: Solve for x
    x = 330,775.83/717.89
  6. Step 6: Final answer
    x = 460.76

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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.