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Finding the Fourth Proportional to 475,656.28, 713,408.48 and 138,618.12

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Solution

The fourth proportional to 475,656.28, 713,408.48 and 138,618.12 is: 207,905.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    475,656.28 : 713,408.48 = 138,618.12 : x
  2. Step 2: Convert to fraction form
    475,656.28/713,408.48 = 138,618.12/x
  3. Step 3: Cross multiply
    475,656.28x = 713,408.48 × 138,618.12
  4. Step 4: Simplify right side
    475,656.28x = 98,891,342,289.66
  5. Step 5: Solve for x
    x = 98,891,342,289.66/475,656.28
  6. Step 6: Final answer
    x = 207,905.05

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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.