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Finding the Fourth Proportional to 847.92, 1,271.42 and 477.57

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Solution

The fourth proportional to 847.92, 1,271.42 and 477.57 is: 716.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.92 : 1,271.42 = 477.57 : x
  2. Step 2: Convert to fraction form
    847.92/1,271.42 = 477.57/x
  3. Step 3: Cross multiply
    847.92x = 1,271.42 × 477.57
  4. Step 4: Simplify right side
    847.92x = 607,196.22
  5. Step 5: Solve for x
    x = 607,196.22/847.92
  6. Step 6: Final answer
    x = 716.10

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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.