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Finding the Fourth Proportional to 439,812.10, 659,718.15 and 287,596.90

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Solution

The fourth proportional to 439,812.10, 659,718.15 and 287,596.90 is: 431,395.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,812.10 : 659,718.15 = 287,596.90 : x
  2. Step 2: Convert to fraction form
    439,812.10/659,718.15 = 287,596.90/x
  3. Step 3: Cross multiply
    439,812.10x = 659,718.15 × 287,596.90
  4. Step 4: Simplify right side
    439,812.10x = 189,732,894,813.74
  5. Step 5: Solve for x
    x = 189,732,894,813.74/439,812.10
  6. Step 6: Final answer
    x = 431,395.35

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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.