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Finding the Fourth Proportional to 430,405.71, 646,013.05 and 225,387.52

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Solution

The fourth proportional to 430,405.71, 646,013.05 and 225,387.52 is: 338,293.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,405.71 : 646,013.05 = 225,387.52 : x
  2. Step 2: Convert to fraction form
    430,405.71/646,013.05 = 225,387.52/x
  3. Step 3: Cross multiply
    430,405.71x = 646,013.05 × 225,387.52
  4. Step 4: Simplify right side
    430,405.71x = 145,603,278,175.57
  5. Step 5: Solve for x
    x = 145,603,278,175.57/430,405.71
  6. Step 6: Final answer
    x = 338,293.09

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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.