Home / 485,550.72-669,680.16-315,839.04

Finding the Fourth Proportional to 485,550.72, 669,680.16 and 315,839.04

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Solution

The fourth proportional to 485,550.72, 669,680.16 and 315,839.04 is: 435,610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,550.72 : 669,680.16 = 315,839.04 : x
  2. Step 2: Convert to fraction form
    485,550.72/669,680.16 = 315,839.04/x
  3. Step 3: Cross multiply
    485,550.72x = 669,680.16 × 315,839.04
  4. Step 4: Simplify right side
    485,550.72x = 211,511,138,841.45
  5. Step 5: Solve for x
    x = 211,511,138,841.45/485,550.72
  6. Step 6: Final answer
    x = 435,610.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.