Home / 439,643.20-659,464.80-387,155.20

Finding the Fourth Proportional to 439,643.20, 659,464.80 and 387,155.20

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Solution

The fourth proportional to 439,643.20, 659,464.80 and 387,155.20 is: 580,732.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,643.20 : 659,464.80 = 387,155.20 : x
  2. Step 2: Convert to fraction form
    439,643.20/659,464.80 = 387,155.20/x
  3. Step 3: Cross multiply
    439,643.20x = 659,464.80 × 387,155.20
  4. Step 4: Simplify right side
    439,643.20x = 255,315,226,536.96
  5. Step 5: Solve for x
    x = 255,315,226,536.96/439,643.20
  6. Step 6: Final answer
    x = 580,732.80

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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.