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Finding the Fourth Proportional to 272,929.80, 409,394.70 and 209,871.30

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Solution

The fourth proportional to 272,929.80, 409,394.70 and 209,871.30 is: 314,806.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,929.80 : 409,394.70 = 209,871.30 : x
  2. Step 2: Convert to fraction form
    272,929.80/409,394.70 = 209,871.30/x
  3. Step 3: Cross multiply
    272,929.80x = 409,394.70 × 209,871.30
  4. Step 4: Simplify right side
    272,929.80x = 85,920,197,902.11
  5. Step 5: Solve for x
    x = 85,920,197,902.11/272,929.80
  6. Step 6: Final answer
    x = 314,806.95

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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.