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Finding the Fourth Proportional to 486,980.90, 672,020.73 and 272,122.73

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Solution

The fourth proportional to 486,980.90, 672,020.73 and 272,122.73 is: 375,522.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,980.90 : 672,020.73 = 272,122.73 : x
  2. Step 2: Convert to fraction form
    486,980.90/672,020.73 = 272,122.73/x
  3. Step 3: Cross multiply
    486,980.90x = 672,020.73 × 272,122.73
  4. Step 4: Simplify right side
    486,980.90x = 182,872,112,304.09
  5. Step 5: Solve for x
    x = 182,872,112,304.09/486,980.90
  6. Step 6: Final answer
    x = 375,522.15

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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.