Home / 781,403.46-1,172,105.18-515,101.69

Finding the Fourth Proportional to 781,403.46, 1,172,105.18 and 515,101.69

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Solution

The fourth proportional to 781,403.46, 1,172,105.18 and 515,101.69 is: 772,652.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,403.46 : 1,172,105.18 = 515,101.69 : x
  2. Step 2: Convert to fraction form
    781,403.46/1,172,105.18 = 515,101.69/x
  3. Step 3: Cross multiply
    781,403.46x = 1,172,105.18 × 515,101.69
  4. Step 4: Simplify right side
    781,403.46x = 603,753,359,075.75
  5. Step 5: Solve for x
    x = 603,753,359,075.75/781,403.46
  6. Step 6: Final answer
    x = 772,652.53

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Double scale
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Similar ratio
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1.5x scale

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.