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Finding the Fourth Proportional to 272,642.60, 408,915.30 and 172,623.80

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Solution

The fourth proportional to 272,642.60, 408,915.30 and 172,623.80 is: 258,904.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,642.60 : 408,915.30 = 172,623.80 : x
  2. Step 2: Convert to fraction form
    272,642.60/408,915.30 = 172,623.80/x
  3. Step 3: Cross multiply
    272,642.60x = 408,915.30 × 172,623.80
  4. Step 4: Simplify right side
    272,642.60x = 70,588,512,964.14
  5. Step 5: Solve for x
    x = 70,588,512,964.14/272,642.60
  6. Step 6: Final answer
    x = 258,904.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.