Home / 687,003.15-948,079.53-381,069.57

Finding the Fourth Proportional to 687,003.15, 948,079.53 and 381,069.57

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Solution

The fourth proportional to 687,003.15, 948,079.53 and 381,069.57 is: 525,884.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,003.15 : 948,079.53 = 381,069.57 : x
  2. Step 2: Convert to fraction form
    687,003.15/948,079.53 = 381,069.57/x
  3. Step 3: Cross multiply
    687,003.15x = 948,079.53 × 381,069.57
  4. Step 4: Simplify right side
    687,003.15x = 361,284,258,822.90
  5. Step 5: Solve for x
    x = 361,284,258,822.90/687,003.15
  6. Step 6: Final answer
    x = 525,884.43

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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.