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Finding the Fourth Proportional to 998.29, 1,488.64 and 929.04

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Solution

The fourth proportional to 998.29, 1,488.64 and 929.04 is: 1,385.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.29 : 1,488.64 = 929.04 : x
  2. Step 2: Convert to fraction form
    998.29/1,488.64 = 929.04/x
  3. Step 3: Cross multiply
    998.29x = 1,488.64 × 929.04
  4. Step 4: Simplify right side
    998.29x = 1,382,998.66
  5. Step 5: Solve for x
    x = 1,382,998.66/998.29
  6. Step 6: Final answer
    x = 1,385.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.