Home / 1,118.25-1,677.50-387.74

Finding the Fourth Proportional to 1,118.25, 1,677.50 and 387.74

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Solution

The fourth proportional to 1,118.25, 1,677.50 and 387.74 is: 581.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.25 : 1,677.50 = 387.74 : x
  2. Step 2: Convert to fraction form
    1,118.25/1,677.50 = 387.74/x
  3. Step 3: Cross multiply
    1,118.25x = 1,677.50 × 387.74
  4. Step 4: Simplify right side
    1,118.25x = 650,423.52
  5. Step 5: Solve for x
    x = 650,423.52/1,118.25
  6. Step 6: Final answer
    x = 581.64

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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.