Home / 431,621.40-647,432.10-331,973.40

Finding the Fourth Proportional to 431,621.40, 647,432.10 and 331,973.40

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Solution

The fourth proportional to 431,621.40, 647,432.10 and 331,973.40 is: 497,960.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,621.40 : 647,432.10 = 331,973.40 : x
  2. Step 2: Convert to fraction form
    431,621.40/647,432.10 = 331,973.40/x
  3. Step 3: Cross multiply
    431,621.40x = 647,432.10 × 331,973.40
  4. Step 4: Simplify right side
    431,621.40x = 214,930,235,506.14
  5. Step 5: Solve for x
    x = 214,930,235,506.14/431,621.40
  6. Step 6: Final answer
    x = 497,960.10

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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.