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Finding the Fourth Proportional to 384,891.65, 531,129.05 and 212,799.66

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Solution

The fourth proportional to 384,891.65, 531,129.05 and 212,799.66 is: 293,651.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,891.65 : 531,129.05 = 212,799.66 : x
  2. Step 2: Convert to fraction form
    384,891.65/531,129.05 = 212,799.66/x
  3. Step 3: Cross multiply
    384,891.65x = 531,129.05 × 212,799.66
  4. Step 4: Simplify right side
    384,891.65x = 113,024,078,998.39
  5. Step 5: Solve for x
    x = 113,024,078,998.39/384,891.65
  6. Step 6: Final answer
    x = 293,651.68

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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.