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Finding the Fourth Proportional to 439,390.44, 659,089.02 and 287,715.24

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Solution

The fourth proportional to 439,390.44, 659,089.02 and 287,715.24 is: 431,575.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,390.44 : 659,089.02 = 287,715.24 : x
  2. Step 2: Convert to fraction form
    439,390.44/659,089.02 = 287,715.24/x
  3. Step 3: Cross multiply
    439,390.44x = 659,089.02 × 287,715.24
  4. Step 4: Simplify right side
    439,390.44x = 189,629,955,570.67
  5. Step 5: Solve for x
    x = 189,629,955,570.67/439,390.44
  6. Step 6: Final answer
    x = 431,575.06

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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.