Home / 1,487.89-2,231.72-392.23

Finding the Fourth Proportional to 1,487.89, 2,231.72 and 392.23

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Solution

The fourth proportional to 1,487.89, 2,231.72 and 392.23 is: 588.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.89 : 2,231.72 = 392.23 : x
  2. Step 2: Convert to fraction form
    1,487.89/2,231.72 = 392.23/x
  3. Step 3: Cross multiply
    1,487.89x = 2,231.72 × 392.23
  4. Step 4: Simplify right side
    1,487.89x = 875,347.54
  5. Step 5: Solve for x
    x = 875,347.54/1,487.89
  6. Step 6: Final answer
    x = 588.31

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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.