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Finding the Fourth Proportional to 212,411.10, 318,616.65 and 203,310.30

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Solution

The fourth proportional to 212,411.10, 318,616.65 and 203,310.30 is: 304,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,411.10 : 318,616.65 = 203,310.30 : x
  2. Step 2: Convert to fraction form
    212,411.10/318,616.65 = 203,310.30/x
  3. Step 3: Cross multiply
    212,411.10x = 318,616.65 × 203,310.30
  4. Step 4: Simplify right side
    212,411.10x = 64,778,046,696.50
  5. Step 5: Solve for x
    x = 64,778,046,696.50/212,411.10
  6. Step 6: Final answer
    x = 304,965.45

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1.5x scale

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.