Home / 431,431.20-646,887.60-221,479.20

Finding the Fourth Proportional to 431,431.20, 646,887.60 and 221,479.20

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Solution

The fourth proportional to 431,431.20, 646,887.60 and 221,479.20 is: 332,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,431.20 : 646,887.60 = 221,479.20 : x
  2. Step 2: Convert to fraction form
    431,431.20/646,887.60 = 221,479.20/x
  3. Step 3: Cross multiply
    431,431.20x = 646,887.60 × 221,479.20
  4. Step 4: Simplify right side
    431,431.20x = 143,272,148,137.92
  5. Step 5: Solve for x
    x = 143,272,148,137.92/431,431.20
  6. Step 6: Final answer
    x = 332,085.74

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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.