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Finding the Fourth Proportional to 279,636.20, 385,775.18 and 188,959.08

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Solution

The fourth proportional to 279,636.20, 385,775.18 and 188,959.08 is: 260,680.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,636.20 : 385,775.18 = 188,959.08 : x
  2. Step 2: Convert to fraction form
    279,636.20/385,775.18 = 188,959.08/x
  3. Step 3: Cross multiply
    279,636.20x = 385,775.18 × 188,959.08
  4. Step 4: Simplify right side
    279,636.20x = 72,895,722,671.55
  5. Step 5: Solve for x
    x = 72,895,722,671.55/279,636.20
  6. Step 6: Final answer
    x = 260,680.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.