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Finding the Fourth Proportional to 487,686.96, 672,962.36 and 303,908.49

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Solution

The fourth proportional to 487,686.96, 672,962.36 and 303,908.49 is: 419,365.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,686.96 : 672,962.36 = 303,908.49 : x
  2. Step 2: Convert to fraction form
    487,686.96/672,962.36 = 303,908.49/x
  3. Step 3: Cross multiply
    487,686.96x = 672,962.36 × 303,908.49
  4. Step 4: Simplify right side
    487,686.96x = 204,518,974,654.44
  5. Step 5: Solve for x
    x = 204,518,974,654.44/487,686.96
  6. Step 6: Final answer
    x = 419,365.27

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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.