Home / 811,613.89-1,120,385.90-485,042.11

Finding the Fourth Proportional to 811,613.89, 1,120,385.90 and 485,042.11

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Solution

The fourth proportional to 811,613.89, 1,120,385.90 and 485,042.11 is: 669,572.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,613.89 : 1,120,385.90 = 485,042.11 : x
  2. Step 2: Convert to fraction form
    811,613.89/1,120,385.90 = 485,042.11/x
  3. Step 3: Cross multiply
    811,613.89x = 1,120,385.90 × 485,042.11
  4. Step 4: Simplify right side
    811,613.89x = 543,434,338,525.04
  5. Step 5: Solve for x
    x = 543,434,338,525.04/811,613.89
  6. Step 6: Final answer
    x = 669,572.50

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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.