Home / 1,147,684.12-1,721,514.85-428,000.87

Finding the Fourth Proportional to 1,147,684.12, 1,721,514.85 and 428,000.87

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Solution

The fourth proportional to 1,147,684.12, 1,721,514.85 and 428,000.87 is: 641,997.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147,684.12 : 1,721,514.85 = 428,000.87 : x
  2. Step 2: Convert to fraction form
    1,147,684.12/1,721,514.85 = 428,000.87/x
  3. Step 3: Cross multiply
    1,147,684.12x = 1,721,514.85 × 428,000.87
  4. Step 4: Simplify right side
    1,147,684.12x = 736,809,853,517.92
  5. Step 5: Solve for x
    x = 736,809,853,517.92/1,147,684.12
  6. Step 6: Final answer
    x = 641,997.08

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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.