Home / 1,004.89-1,387.55-669.12

Finding the Fourth Proportional to 1,004.89, 1,387.55 and 669.12

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Solution

The fourth proportional to 1,004.89, 1,387.55 and 669.12 is: 923.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.89 : 1,387.55 = 669.12 : x
  2. Step 2: Convert to fraction form
    1,004.89/1,387.55 = 669.12/x
  3. Step 3: Cross multiply
    1,004.89x = 1,387.55 × 669.12
  4. Step 4: Simplify right side
    1,004.89x = 928,437.46
  5. Step 5: Solve for x
    x = 928,437.46/1,004.89
  6. Step 6: Final answer
    x = 923.92

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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.