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Finding the Fourth Proportional to 2,658.85, 3,988.28 and 927.47

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Solution

The fourth proportional to 2,658.85, 3,988.28 and 927.47 is: 1,391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.85 : 3,988.28 = 927.47 : x
  2. Step 2: Convert to fraction form
    2,658.85/3,988.28 = 927.47/x
  3. Step 3: Cross multiply
    2,658.85x = 3,988.28 × 927.47
  4. Step 4: Simplify right side
    2,658.85x = 3,699,022.34
  5. Step 5: Solve for x
    x = 3,699,022.34/2,658.85
  6. Step 6: Final answer
    x = 1,391.21

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1.5x scale

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.