Home / 642,545.12-886,735.14-387,846.56

Finding the Fourth Proportional to 642,545.12, 886,735.14 and 387,846.56

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Solution

The fourth proportional to 642,545.12, 886,735.14 and 387,846.56 is: 535,242.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,545.12 : 886,735.14 = 387,846.56 : x
  2. Step 2: Convert to fraction form
    642,545.12/886,735.14 = 387,846.56/x
  3. Step 3: Cross multiply
    642,545.12x = 886,735.14 × 387,846.56
  4. Step 4: Simplify right side
    642,545.12x = 343,917,173,680.12
  5. Step 5: Solve for x
    x = 343,917,173,680.12/642,545.12
  6. Step 6: Final answer
    x = 535,242.06

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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.