Home / 1,487.59-2,231.34-391.95

Finding the Fourth Proportional to 1,487.59, 2,231.34 and 391.95

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Solution

The fourth proportional to 1,487.59, 2,231.34 and 391.95 is: 587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.59 : 2,231.34 = 391.95 : x
  2. Step 2: Convert to fraction form
    1,487.59/2,231.34 = 391.95/x
  3. Step 3: Cross multiply
    1,487.59x = 2,231.34 × 391.95
  4. Step 4: Simplify right side
    1,487.59x = 874,576.07
  5. Step 5: Solve for x
    x = 874,576.07/1,487.59
  6. Step 6: Final answer
    x = 587.92

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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.