Home / 1,186,318.28-1,779,109.72-428,061.70

Finding the Fourth Proportional to 1,186,318.28, 1,779,109.72 and 428,061.70

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Solution

The fourth proportional to 1,186,318.28, 1,779,109.72 and 428,061.70 is: 641,959.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,318.28 : 1,779,109.72 = 428,061.70 : x
  2. Step 2: Convert to fraction form
    1,186,318.28/1,779,109.72 = 428,061.70/x
  3. Step 3: Cross multiply
    1,186,318.28x = 1,779,109.72 × 428,061.70
  4. Step 4: Simplify right side
    1,186,318.28x = 761,568,731,229.72
  5. Step 5: Solve for x
    x = 761,568,731,229.72/1,186,318.28
  6. Step 6: Final answer
    x = 641,959.87

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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.