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Finding the Fourth Proportional to 439,451.80, 606,448.15 and 258,171.28

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Solution

The fourth proportional to 439,451.80, 606,448.15 and 258,171.28 is: 356,279.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,451.80 : 606,448.15 = 258,171.28 : x
  2. Step 2: Convert to fraction form
    439,451.80/606,448.15 = 258,171.28/x
  3. Step 3: Cross multiply
    439,451.80x = 606,448.15 × 258,171.28
  4. Step 4: Simplify right side
    439,451.80x = 156,567,495,139.13
  5. Step 5: Solve for x
    x = 156,567,495,139.13/439,451.80
  6. Step 6: Final answer
    x = 356,279.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.