Home / 645,733.54-891,112.17-359,253.55

Finding the Fourth Proportional to 645,733.54, 891,112.17 and 359,253.55

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Solution

The fourth proportional to 645,733.54, 891,112.17 and 359,253.55 is: 495,769.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,733.54 : 891,112.17 = 359,253.55 : x
  2. Step 2: Convert to fraction form
    645,733.54/891,112.17 = 359,253.55/x
  3. Step 3: Cross multiply
    645,733.54x = 891,112.17 × 359,253.55
  4. Step 4: Simplify right side
    645,733.54x = 320,135,210,520.70
  5. Step 5: Solve for x
    x = 320,135,210,520.70/645,733.54
  6. Step 6: Final answer
    x = 495,769.83

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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.