Home / 439,628.20-659,442.30-387,140.20

Finding the Fourth Proportional to 439,628.20, 659,442.30 and 387,140.20

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Solution

The fourth proportional to 439,628.20, 659,442.30 and 387,140.20 is: 580,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,628.20 : 659,442.30 = 387,140.20 : x
  2. Step 2: Convert to fraction form
    439,628.20/659,442.30 = 387,140.20/x
  3. Step 3: Cross multiply
    439,628.20x = 659,442.30 × 387,140.20
  4. Step 4: Simplify right side
    439,628.20x = 255,296,623,910.46
  5. Step 5: Solve for x
    x = 255,296,623,910.46/439,628.20
  6. Step 6: Final answer
    x = 580,710.30

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1.5x scale

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.