Home / 280,375.18-386,915.10-172,902.22

Finding the Fourth Proportional to 280,375.18, 386,915.10 and 172,902.22

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Solution

The fourth proportional to 280,375.18, 386,915.10 and 172,902.22 is: 238,603.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,375.18 : 386,915.10 = 172,902.22 : x
  2. Step 2: Convert to fraction form
    280,375.18/386,915.10 = 172,902.22/x
  3. Step 3: Cross multiply
    280,375.18x = 386,915.10 × 172,902.22
  4. Step 4: Simplify right side
    280,375.18x = 66,898,479,741.52
  5. Step 5: Solve for x
    x = 66,898,479,741.52/280,375.18
  6. Step 6: Final answer
    x = 238,603.43

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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.