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Finding the Fourth Proportional to 439,603.68, 659,398.36 and 140,080.21

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Solution

The fourth proportional to 439,603.68, 659,398.36 and 140,080.21 is: 210,118.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,603.68 : 659,398.36 = 140,080.21 : x
  2. Step 2: Convert to fraction form
    439,603.68/659,398.36 = 140,080.21/x
  3. Step 3: Cross multiply
    439,603.68x = 659,398.36 × 140,080.21
  4. Step 4: Simplify right side
    439,603.68x = 92,368,660,392.26
  5. Step 5: Solve for x
    x = 92,368,660,392.26/439,603.68
  6. Step 6: Final answer
    x = 210,118.04

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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.