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Finding the Fourth Proportional to 418,478.08, 627,720.96 and 298,026.88

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Solution

The fourth proportional to 418,478.08, 627,720.96 and 298,026.88 is: 447,043.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,478.08 : 627,720.96 = 298,026.88 : x
  2. Step 2: Convert to fraction form
    418,478.08/627,720.96 = 298,026.88/x
  3. Step 3: Cross multiply
    418,478.08x = 627,720.96 × 298,026.88
  4. Step 4: Simplify right side
    418,478.08x = 187,077,719,219.41
  5. Step 5: Solve for x
    x = 187,077,719,219.41/418,478.08
  6. Step 6: Final answer
    x = 447,043.05

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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.