Home / 1,412.17-2,118.23-487.70

Finding the Fourth Proportional to 1,412.17, 2,118.23 and 487.70

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Solution

The fourth proportional to 1,412.17, 2,118.23 and 487.70 is: 731.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.17 : 2,118.23 = 487.70 : x
  2. Step 2: Convert to fraction form
    1,412.17/2,118.23 = 487.70/x
  3. Step 3: Cross multiply
    1,412.17x = 2,118.23 × 487.70
  4. Step 4: Simplify right side
    1,412.17x = 1,033,047.74
  5. Step 5: Solve for x
    x = 1,033,047.74/1,412.17
  6. Step 6: Final answer
    x = 731.53

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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.