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Finding the Fourth Proportional to 847.92, 1,170.36 and 498.72

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Solution

The fourth proportional to 847.92, 1,170.36 and 498.72 is: 688.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.92 : 1,170.36 = 498.72 : x
  2. Step 2: Convert to fraction form
    847.92/1,170.36 = 498.72/x
  3. Step 3: Cross multiply
    847.92x = 1,170.36 × 498.72
  4. Step 4: Simplify right side
    847.92x = 583,681.94
  5. Step 5: Solve for x
    x = 583,681.94/847.92
  6. Step 6: Final answer
    x = 688.37

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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.