Home / 2,680,128.80-4,020,287.60-858,549.12

Finding the Fourth Proportional to 2,680,128.80, 4,020,287.60 and 858,549.12

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Solution

The fourth proportional to 2,680,128.80, 4,020,287.60 and 858,549.12 is: 1,287,853.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680,128.80 : 4,020,287.60 = 858,549.12 : x
  2. Step 2: Convert to fraction form
    2,680,128.80/4,020,287.60 = 858,549.12/x
  3. Step 3: Cross multiply
    2,680,128.80x = 4,020,287.60 × 858,549.12
  4. Step 4: Simplify right side
    2,680,128.80x = 3,451,614,381,126.91
  5. Step 5: Solve for x
    x = 3,451,614,381,126.91/2,680,128.80
  6. Step 6: Final answer
    x = 1,287,853.92

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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.