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Finding the Fourth Proportional to 458,308.01, 687,488.28 and 121,339.90

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Solution

The fourth proportional to 458,308.01, 687,488.28 and 121,339.90 is: 182,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,308.01 : 687,488.28 = 121,339.90 : x
  2. Step 2: Convert to fraction form
    458,308.01/687,488.28 = 121,339.90/x
  3. Step 3: Cross multiply
    458,308.01x = 687,488.28 × 121,339.90
  4. Step 4: Simplify right side
    458,308.01x = 83,419,759,146.37
  5. Step 5: Solve for x
    x = 83,419,759,146.37/458,308.01
  6. Step 6: Final answer
    x = 182,016.80

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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.