Home / 430,147.80-645,351.30-305,731.80

Finding the Fourth Proportional to 430,147.80, 645,351.30 and 305,731.80

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Solution

The fourth proportional to 430,147.80, 645,351.30 and 305,731.80 is: 458,689.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,147.80 : 645,351.30 = 305,731.80 : x
  2. Step 2: Convert to fraction form
    430,147.80/645,351.30 = 305,731.80/x
  3. Step 3: Cross multiply
    430,147.80x = 645,351.30 × 305,731.80
  4. Step 4: Simplify right side
    430,147.80x = 197,304,414,581.34
  5. Step 5: Solve for x
    x = 197,304,414,581.34/430,147.80
  6. Step 6: Final answer
    x = 458,689.81

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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.