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Finding the Fourth Proportional to 458,316.48, 687,395.46 and 121,361.97

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Solution

The fourth proportional to 458,316.48, 687,395.46 and 121,361.97 is: 182,021.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,316.48 : 687,395.46 = 121,361.97 : x
  2. Step 2: Convert to fraction form
    458,316.48/687,395.46 = 121,361.97/x
  3. Step 3: Cross multiply
    458,316.48x = 687,395.46 × 121,361.97
  4. Step 4: Simplify right side
    458,316.48x = 83,423,667,194.66
  5. Step 5: Solve for x
    x = 83,423,667,194.66/458,316.48
  6. Step 6: Final answer
    x = 182,021.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.