Home / 1,417.12-2,122.94-928.68

Finding the Fourth Proportional to 1,417.12, 2,122.94 and 928.68

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Solution

The fourth proportional to 1,417.12, 2,122.94 and 928.68 is: 1,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.12 : 2,122.94 = 928.68 : x
  2. Step 2: Convert to fraction form
    1,417.12/2,122.94 = 928.68/x
  3. Step 3: Cross multiply
    1,417.12x = 2,122.94 × 928.68
  4. Step 4: Simplify right side
    1,417.12x = 1,971,531.92
  5. Step 5: Solve for x
    x = 1,971,531.92/1,417.12
  6. Step 6: Final answer
    x = 1,391.22

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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.