Home / 1,117.48-1,543.61-931.58

Finding the Fourth Proportional to 1,117.48, 1,543.61 and 931.58

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Solution

The fourth proportional to 1,117.48, 1,543.61 and 931.58 is: 1,286.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.48 : 1,543.61 = 931.58 : x
  2. Step 2: Convert to fraction form
    1,117.48/1,543.61 = 931.58/x
  3. Step 3: Cross multiply
    1,117.48x = 1,543.61 × 931.58
  4. Step 4: Simplify right side
    1,117.48x = 1,437,995.40
  5. Step 5: Solve for x
    x = 1,437,995.40/1,117.48
  6. Step 6: Final answer
    x = 1,286.82

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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.