Home / 1,412.70-2,118.81-438.66

Finding the Fourth Proportional to 1,412.70, 2,118.81 and 438.66

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Solution

The fourth proportional to 1,412.70, 2,118.81 and 438.66 is: 657.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.70 : 2,118.81 = 438.66 : x
  2. Step 2: Convert to fraction form
    1,412.70/2,118.81 = 438.66/x
  3. Step 3: Cross multiply
    1,412.70x = 2,118.81 × 438.66
  4. Step 4: Simplify right side
    1,412.70x = 929,437.19
  5. Step 5: Solve for x
    x = 929,437.19/1,412.70
  6. Step 6: Final answer
    x = 657.92

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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.