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Finding the Fourth Proportional to 486,989.88, 672,033.54 and 272,131.72

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Solution

The fourth proportional to 486,989.88, 672,033.54 and 272,131.72 is: 375,534.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,989.88 : 672,033.54 = 272,131.72 : x
  2. Step 2: Convert to fraction form
    486,989.88/672,033.54 = 272,131.72/x
  3. Step 3: Cross multiply
    486,989.88x = 672,033.54 × 272,131.72
  4. Step 4: Simplify right side
    486,989.88x = 182,881,643,137.89
  5. Step 5: Solve for x
    x = 182,881,643,137.89/486,989.88
  6. Step 6: Final answer
    x = 375,534.79

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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.