Home / 321,138.64-442,160.24-272,644.65

Finding the Fourth Proportional to 321,138.64, 442,160.24 and 272,644.65

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Solution

The fourth proportional to 321,138.64, 442,160.24 and 272,644.65 is: 375,391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,138.64 : 442,160.24 = 272,644.65 : x
  2. Step 2: Convert to fraction form
    321,138.64/442,160.24 = 272,644.65/x
  3. Step 3: Cross multiply
    321,138.64x = 442,160.24 × 272,644.65
  4. Step 4: Simplify right side
    321,138.64x = 120,552,623,878.72
  5. Step 5: Solve for x
    x = 120,552,623,878.72/321,138.64
  6. Step 6: Final answer
    x = 375,391.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.