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Finding the Fourth Proportional to 487,115.40, 672,198.10 and 266,348.64

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Solution

The fourth proportional to 487,115.40, 672,198.10 and 266,348.64 is: 367,549.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,115.40 : 672,198.10 = 266,348.64 : x
  2. Step 2: Convert to fraction form
    487,115.40/672,198.10 = 266,348.64/x
  3. Step 3: Cross multiply
    487,115.40x = 672,198.10 × 266,348.64
  4. Step 4: Simplify right side
    487,115.40x = 179,039,049,745.58
  5. Step 5: Solve for x
    x = 179,039,049,745.58/487,115.40
  6. Step 6: Final answer
    x = 367,549.56

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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.