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Finding the Fourth Proportional to 268,592.10, 402,402.15 and 212,799.30

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Solution

The fourth proportional to 268,592.10, 402,402.15 and 212,799.30 is: 318,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,592.10 : 402,402.15 = 212,799.30 : x
  2. Step 2: Convert to fraction form
    268,592.10/402,402.15 = 212,799.30/x
  3. Step 3: Cross multiply
    268,592.10x = 402,402.15 × 212,799.30
  4. Step 4: Simplify right side
    268,592.10x = 85,630,895,838.50
  5. Step 5: Solve for x
    x = 85,630,895,838.50/268,592.10
  6. Step 6: Final answer
    x = 318,813.90

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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.