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Finding the Fourth Proportional to 315,885.20, 435,915.09 and 172,646.27

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Solution

The fourth proportional to 315,885.20, 435,915.09 and 172,646.27 is: 238,248.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,885.20 : 435,915.09 = 172,646.27 : x
  2. Step 2: Convert to fraction form
    315,885.20/435,915.09 = 172,646.27/x
  3. Step 3: Cross multiply
    315,885.20x = 435,915.09 × 172,646.27
  4. Step 4: Simplify right side
    315,885.20x = 75,259,112,145.64
  5. Step 5: Solve for x
    x = 75,259,112,145.64/315,885.20
  6. Step 6: Final answer
    x = 238,248.30

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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.