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Finding the Fourth Proportional to 438,992.64, 658,036.98 and 172,645.20

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Solution

The fourth proportional to 438,992.64, 658,036.98 and 172,645.20 is: 258,790.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,992.64 : 658,036.98 = 172,645.20 : x
  2. Step 2: Convert to fraction form
    438,992.64/658,036.98 = 172,645.20/x
  3. Step 3: Cross multiply
    438,992.64x = 658,036.98 × 172,645.20
  4. Step 4: Simplify right side
    438,992.64x = 113,606,926,019.50
  5. Step 5: Solve for x
    x = 113,606,926,019.50/438,992.64
  6. Step 6: Final answer
    x = 258,790.05

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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.