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Finding the Fourth Proportional to 890.38, 1,228.80 and 541.27

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Solution

The fourth proportional to 890.38, 1,228.80 and 541.27 is: 747.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.38 : 1,228.80 = 541.27 : x
  2. Step 2: Convert to fraction form
    890.38/1,228.80 = 541.27/x
  3. Step 3: Cross multiply
    890.38x = 1,228.80 × 541.27
  4. Step 4: Simplify right side
    890.38x = 665,112.58
  5. Step 5: Solve for x
    x = 665,112.58/890.38
  6. Step 6: Final answer
    x = 747.00

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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.