Home / 1,042.19-1,437.41-669.20

Finding the Fourth Proportional to 1,042.19, 1,437.41 and 669.20

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Solution

The fourth proportional to 1,042.19, 1,437.41 and 669.20 is: 922.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.19 : 1,437.41 = 669.20 : x
  2. Step 2: Convert to fraction form
    1,042.19/1,437.41 = 669.20/x
  3. Step 3: Cross multiply
    1,042.19x = 1,437.41 × 669.20
  4. Step 4: Simplify right side
    1,042.19x = 961,911.43
  5. Step 5: Solve for x
    x = 961,911.43/1,042.19
  6. Step 6: Final answer
    x = 922.98

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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.