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Finding the Fourth Proportional to 418,408,982.42, 627,704,275.32 and 127,268,538.39

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Solution

The fourth proportional to 418,408,982.42, 627,704,275.32 and 127,268,538.39 is: 190,930,426.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,408,982.42 : 627,704,275.32 = 127,268,538.39 : x
  2. Step 2: Convert to fraction form
    418,408,982.42/627,704,275.32 = 127,268,538.39/x
  3. Step 3: Cross multiply
    418,408,982.42x = 627,704,275.32 × 127,268,538.39
  4. Step 4: Simplify right side
    418,408,982.42x = 79,887,005,658,838,000
  5. Step 5: Solve for x
    x = 79,887,005,658,838,000/418,408,982.42
  6. Step 6: Final answer
    x = 190,930,426.96

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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.