Home / 280,429.38-420,640.02-130,585.86

Finding the Fourth Proportional to 280,429.38, 420,640.02 and 130,585.86

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Solution

The fourth proportional to 280,429.38, 420,640.02 and 130,585.86 is: 195,876.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,429.38 : 420,640.02 = 130,585.86 : x
  2. Step 2: Convert to fraction form
    280,429.38/420,640.02 = 130,585.86/x
  3. Step 3: Cross multiply
    280,429.38x = 420,640.02 × 130,585.86
  4. Step 4: Simplify right side
    280,429.38x = 54,929,638,762.12
  5. Step 5: Solve for x
    x = 54,929,638,762.12/280,429.38
  6. Step 6: Final answer
    x = 195,876.90

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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.