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Finding the Fourth Proportional to 384,879.47, 531,124.49 and 215,129.39

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Solution

The fourth proportional to 384,879.47, 531,124.49 and 215,129.39 is: 296,873.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,879.47 : 531,124.49 = 215,129.39 : x
  2. Step 2: Convert to fraction form
    384,879.47/531,124.49 = 215,129.39/x
  3. Step 3: Cross multiply
    384,879.47x = 531,124.49 × 215,129.39
  4. Step 4: Simplify right side
    384,879.47x = 114,260,486,472.11
  5. Step 5: Solve for x
    x = 114,260,486,472.11/384,879.47
  6. Step 6: Final answer
    x = 296,873.43

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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.