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Finding the Fourth Proportional to 890.91, 1,337.40 and 886.95

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Solution

The fourth proportional to 890.91, 1,337.40 and 886.95 is: 1,331.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.91 : 1,337.40 = 886.95 : x
  2. Step 2: Convert to fraction form
    890.91/1,337.40 = 886.95/x
  3. Step 3: Cross multiply
    890.91x = 1,337.40 × 886.95
  4. Step 4: Simplify right side
    890.91x = 1,186,206.93
  5. Step 5: Solve for x
    x = 1,186,206.93/890.91
  6. Step 6: Final answer
    x = 1,331.46

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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.