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Finding the Fourth Proportional to 487,153.69, 672,286.25 and 266,403.96

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Solution

The fourth proportional to 487,153.69, 672,286.25 and 266,403.96 is: 367,645.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,153.69 : 672,286.25 = 266,403.96 : x
  2. Step 2: Convert to fraction form
    487,153.69/672,286.25 = 266,403.96/x
  3. Step 3: Cross multiply
    487,153.69x = 672,286.25 × 266,403.96
  4. Step 4: Simplify right side
    487,153.69x = 179,099,719,919.56
  5. Step 5: Solve for x
    x = 179,099,719,919.56/487,153.69
  6. Step 6: Final answer
    x = 367,645.21

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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.