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Finding the Fourth Proportional to 847.92, 1,271.16 and 558.48

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Solution

The fourth proportional to 847.92, 1,271.16 and 558.48 is: 837.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.92 : 1,271.16 = 558.48 : x
  2. Step 2: Convert to fraction form
    847.92/1,271.16 = 558.48/x
  3. Step 3: Cross multiply
    847.92x = 1,271.16 × 558.48
  4. Step 4: Simplify right side
    847.92x = 709,917.44
  5. Step 5: Solve for x
    x = 709,917.44/847.92
  6. Step 6: Final answer
    x = 837.25

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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.