Home / 1,124.12-1,686.26-1,117.72

Finding the Fourth Proportional to 1,124.12, 1,686.26 and 1,117.72

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Solution

The fourth proportional to 1,124.12, 1,686.26 and 1,117.72 is: 1,676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.12 : 1,686.26 = 1,117.72 : x
  2. Step 2: Convert to fraction form
    1,124.12/1,686.26 = 1,117.72/x
  3. Step 3: Cross multiply
    1,124.12x = 1,686.26 × 1,117.72
  4. Step 4: Simplify right side
    1,124.12x = 1,884,766.53
  5. Step 5: Solve for x
    x = 1,884,766.53/1,124.12
  6. Step 6: Final answer
    x = 1,676.66

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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.