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Finding the Fourth Proportional to 717.93, 1,078.16 and 707.67

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Solution

The fourth proportional to 717.93, 1,078.16 and 707.67 is: 1,062.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.93 : 1,078.16 = 707.67 : x
  2. Step 2: Convert to fraction form
    717.93/1,078.16 = 707.67/x
  3. Step 3: Cross multiply
    717.93x = 1,078.16 × 707.67
  4. Step 4: Simplify right side
    717.93x = 762,977.95
  5. Step 5: Solve for x
    x = 762,977.95/717.93
  6. Step 6: Final answer
    x = 1,062.75

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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.