Home / 438,919.60-657,985.20-172,861.60

Finding the Fourth Proportional to 438,919.60, 657,985.20 and 172,861.60

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Solution

The fourth proportional to 438,919.60, 657,985.20 and 172,861.60 is: 259,137.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,919.60 : 657,985.20 = 172,861.60 : x
  2. Step 2: Convert to fraction form
    438,919.60/657,985.20 = 172,861.60/x
  3. Step 3: Cross multiply
    438,919.60x = 657,985.20 × 172,861.60
  4. Step 4: Simplify right side
    438,919.60x = 113,740,374,448.32
  5. Step 5: Solve for x
    x = 113,740,374,448.32/438,919.60
  6. Step 6: Final answer
    x = 259,137.15

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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.