Home / 642,549.12-886,740.66-387,850.56

Finding the Fourth Proportional to 642,549.12, 886,740.66 and 387,850.56

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Solution

The fourth proportional to 642,549.12, 886,740.66 and 387,850.56 is: 535,247.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,549.12 : 886,740.66 = 387,850.56 : x
  2. Step 2: Convert to fraction form
    642,549.12/886,740.66 = 387,850.56/x
  3. Step 3: Cross multiply
    642,549.12x = 886,740.66 × 387,850.56
  4. Step 4: Simplify right side
    642,549.12x = 343,922,861,555.77
  5. Step 5: Solve for x
    x = 343,922,861,555.77/642,549.12
  6. Step 6: Final answer
    x = 535,247.58

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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.