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Finding the Fourth Proportional to 1,092.99, 1,508.70 and 928.15

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Solution

The fourth proportional to 1,092.99, 1,508.70 and 928.15 is: 1,281.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.99 : 1,508.70 = 928.15 : x
  2. Step 2: Convert to fraction form
    1,092.99/1,508.70 = 928.15/x
  3. Step 3: Cross multiply
    1,092.99x = 1,508.70 × 928.15
  4. Step 4: Simplify right side
    1,092.99x = 1,400,299.91
  5. Step 5: Solve for x
    x = 1,400,299.91/1,092.99
  6. Step 6: Final answer
    x = 1,281.17

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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.