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Finding the Fourth Proportional to 272,901.60, 409,352.40 and 215,820.90

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Solution

The fourth proportional to 272,901.60, 409,352.40 and 215,820.90 is: 323,731.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,901.60 : 409,352.40 = 215,820.90 : x
  2. Step 2: Convert to fraction form
    272,901.60/409,352.40 = 215,820.90/x
  3. Step 3: Cross multiply
    272,901.60x = 409,352.40 × 215,820.90
  4. Step 4: Simplify right side
    272,901.60x = 88,346,803,385.16
  5. Step 5: Solve for x
    x = 88,346,803,385.16/272,901.60
  6. Step 6: Final answer
    x = 323,731.35

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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.