Home / 438,649.20-658,146.60-172,364.40

Finding the Fourth Proportional to 438,649.20, 658,146.60 and 172,364.40

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Solution

The fourth proportional to 438,649.20, 658,146.60 and 172,364.40 is: 258,614.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,649.20 : 658,146.60 = 172,364.40 : x
  2. Step 2: Convert to fraction form
    438,649.20/658,146.60 = 172,364.40/x
  3. Step 3: Cross multiply
    438,649.20x = 658,146.60 × 172,364.40
  4. Step 4: Simplify right side
    438,649.20x = 113,441,043,821.04
  5. Step 5: Solve for x
    x = 113,441,043,821.04/438,649.20
  6. Step 6: Final answer
    x = 258,614.50

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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.