Home / 642,100.77-886,105.58-387,402.75

Finding the Fourth Proportional to 642,100.77, 886,105.58 and 387,402.75

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Solution

The fourth proportional to 642,100.77, 886,105.58 and 387,402.75 is: 534,619.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,100.77 : 886,105.58 = 387,402.75 : x
  2. Step 2: Convert to fraction form
    642,100.77/886,105.58 = 387,402.75/x
  3. Step 3: Cross multiply
    642,100.77x = 886,105.58 × 387,402.75
  4. Step 4: Simplify right side
    642,100.77x = 343,279,736,545.33
  5. Step 5: Solve for x
    x = 343,279,736,545.33/642,100.77
  6. Step 6: Final answer
    x = 534,619.72

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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.