Home / 1,412.53-2,118.85-438.61

Finding the Fourth Proportional to 1,412.53, 2,118.85 and 438.61

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Solution

The fourth proportional to 1,412.53, 2,118.85 and 438.61 is: 657.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.53 : 2,118.85 = 438.61 : x
  2. Step 2: Convert to fraction form
    1,412.53/2,118.85 = 438.61/x
  3. Step 3: Cross multiply
    1,412.53x = 2,118.85 × 438.61
  4. Step 4: Simplify right side
    1,412.53x = 929,342.40
  5. Step 5: Solve for x
    x = 929,342.40/1,412.53
  6. Step 6: Final answer
    x = 657.93

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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.