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Finding the Fourth Proportional to 272,038.40, 408,057.60 and 172,311.20

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Solution

The fourth proportional to 272,038.40, 408,057.60 and 172,311.20 is: 258,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,038.40 : 408,057.60 = 172,311.20 : x
  2. Step 2: Convert to fraction form
    272,038.40/408,057.60 = 172,311.20/x
  3. Step 3: Cross multiply
    272,038.40x = 408,057.60 × 172,311.20
  4. Step 4: Simplify right side
    272,038.40x = 70,312,894,725.12
  5. Step 5: Solve for x
    x = 70,312,894,725.12/272,038.40
  6. Step 6: Final answer
    x = 258,466.80

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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.