Home / 431,427.20-646,881.60-221,475.20

Finding the Fourth Proportional to 431,427.20, 646,881.60 and 221,475.20

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Solution

The fourth proportional to 431,427.20, 646,881.60 and 221,475.20 is: 332,079.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,427.20 : 646,881.60 = 221,475.20 : x
  2. Step 2: Convert to fraction form
    431,427.20/646,881.60 = 221,475.20/x
  3. Step 3: Cross multiply
    431,427.20x = 646,881.60 × 221,475.20
  4. Step 4: Simplify right side
    431,427.20x = 143,268,231,736.32
  5. Step 5: Solve for x
    x = 143,268,231,736.32/431,427.20
  6. Step 6: Final answer
    x = 332,079.74

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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.