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Finding the Fourth Proportional to 384,959.80, 531,234.78 and 215,209.72

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Solution

The fourth proportional to 384,959.80, 531,234.78 and 215,209.72 is: 296,983.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,959.80 : 531,234.78 = 215,209.72 : x
  2. Step 2: Convert to fraction form
    384,959.80/531,234.78 = 215,209.72/x
  3. Step 3: Cross multiply
    384,959.80x = 531,234.78 × 215,209.72
  4. Step 4: Simplify right side
    384,959.80x = 114,326,888,258.06
  5. Step 5: Solve for x
    x = 114,326,888,258.06/384,959.80
  6. Step 6: Final answer
    x = 296,983.97

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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.