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Finding the Fourth Proportional to 486,991.88, 672,036.30 and 272,133.72

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Solution

The fourth proportional to 486,991.88, 672,036.30 and 272,133.72 is: 375,537.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,991.88 : 672,036.30 = 272,133.72 : x
  2. Step 2: Convert to fraction form
    486,991.88/672,036.30 = 272,133.72/x
  3. Step 3: Cross multiply
    486,991.88x = 672,036.30 × 272,133.72
  4. Step 4: Simplify right side
    486,991.88x = 182,883,738,294.04
  5. Step 5: Solve for x
    x = 182,883,738,294.04/486,991.88
  6. Step 6: Final answer
    x = 375,537.55

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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.