Home / 1,059,148.20-1,589,111.10-428,125.80

Finding the Fourth Proportional to 1,059,148.20, 1,589,111.10 and 428,125.80

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Solution

The fourth proportional to 1,059,148.20, 1,589,111.10 and 428,125.80 is: 642,345.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059,148.20 : 1,589,111.10 = 428,125.80 : x
  2. Step 2: Convert to fraction form
    1,059,148.20/1,589,111.10 = 428,125.80/x
  3. Step 3: Cross multiply
    1,059,148.20x = 1,589,111.10 × 428,125.80
  4. Step 4: Simplify right side
    1,059,148.20x = 680,339,460,976.38
  5. Step 5: Solve for x
    x = 680,339,460,976.38/1,059,148.20
  6. Step 6: Final answer
    x = 642,345.86

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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.