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Finding the Fourth Proportional to 439,012.64, 658,066.96 and 172,665.20

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Solution

The fourth proportional to 439,012.64, 658,066.96 and 172,665.20 is: 258,820.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,012.64 : 658,066.96 = 172,665.20 : x
  2. Step 2: Convert to fraction form
    439,012.64/658,066.96 = 172,665.20/x
  3. Step 3: Cross multiply
    439,012.64x = 658,066.96 × 172,665.20
  4. Step 4: Simplify right side
    439,012.64x = 113,625,263,261.79
  5. Step 5: Solve for x
    x = 113,625,263,261.79/439,012.64
  6. Step 6: Final answer
    x = 258,820.03

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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.