Home / 1,292.13-1,938.16-318.24

Finding the Fourth Proportional to 1,292.13, 1,938.16 and 318.24

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Solution

The fourth proportional to 1,292.13, 1,938.16 and 318.24 is: 477.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.13 : 1,938.16 = 318.24 : x
  2. Step 2: Convert to fraction form
    1,292.13/1,938.16 = 318.24/x
  3. Step 3: Cross multiply
    1,292.13x = 1,938.16 × 318.24
  4. Step 4: Simplify right side
    1,292.13x = 616,800.04
  5. Step 5: Solve for x
    x = 616,800.04/1,292.13
  6. Step 6: Final answer
    x = 477.35

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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.