Home / 431,326.30-646,989.45-305,355.10

Finding the Fourth Proportional to 431,326.30, 646,989.45 and 305,355.10

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Solution

The fourth proportional to 431,326.30, 646,989.45 and 305,355.10 is: 458,032.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,326.30 : 646,989.45 = 305,355.10 : x
  2. Step 2: Convert to fraction form
    431,326.30/646,989.45 = 305,355.10/x
  3. Step 3: Cross multiply
    431,326.30x = 646,989.45 × 305,355.10
  4. Step 4: Simplify right side
    431,326.30x = 197,561,528,203.70
  5. Step 5: Solve for x
    x = 197,561,528,203.70/431,326.30
  6. Step 6: Final answer
    x = 458,032.65

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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.