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Finding the Fourth Proportional to 889.76, 1,228.50 and 540.92

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Solution

The fourth proportional to 889.76, 1,228.50 and 540.92 is: 746.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.76 : 1,228.50 = 540.92 : x
  2. Step 2: Convert to fraction form
    889.76/1,228.50 = 540.92/x
  3. Step 3: Cross multiply
    889.76x = 1,228.50 × 540.92
  4. Step 4: Simplify right side
    889.76x = 664,520.22
  5. Step 5: Solve for x
    x = 664,520.22/889.76
  6. Step 6: Final answer
    x = 746.85

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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.