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Finding the Fourth Proportional to 847.67, 1,170.17 and 498.38

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Solution

The fourth proportional to 847.67, 1,170.17 and 498.38 is: 687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.67 : 1,170.17 = 498.38 : x
  2. Step 2: Convert to fraction form
    847.67/1,170.17 = 498.38/x
  3. Step 3: Cross multiply
    847.67x = 1,170.17 × 498.38
  4. Step 4: Simplify right side
    847.67x = 583,180.98
  5. Step 5: Solve for x
    x = 583,180.98/847.67
  6. Step 6: Final answer
    x = 687.99

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1.5x scale

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.