Home / 811,613.64-1,120,385.55-485,041.86

Finding the Fourth Proportional to 811,613.64, 1,120,385.55 and 485,041.86

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Solution

The fourth proportional to 811,613.64, 1,120,385.55 and 485,041.86 is: 669,572.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,613.64 : 1,120,385.55 = 485,041.86 : x
  2. Step 2: Convert to fraction form
    811,613.64/1,120,385.55 = 485,041.86/x
  3. Step 3: Cross multiply
    811,613.64x = 1,120,385.55 × 485,041.86
  4. Step 4: Simplify right side
    811,613.64x = 543,433,891,089.12
  5. Step 5: Solve for x
    x = 543,433,891,089.12/811,613.64
  6. Step 6: Final answer
    x = 669,572.15

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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.