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Finding the Fourth Proportional to 384,809.84, 531,036.24 and 215,043.92

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Solution

The fourth proportional to 384,809.84, 531,036.24 and 215,043.92 is: 296,759.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,809.84 : 531,036.24 = 215,043.92 : x
  2. Step 2: Convert to fraction form
    384,809.84/531,036.24 = 215,043.92/x
  3. Step 3: Cross multiply
    384,809.84x = 531,036.24 × 215,043.92
  4. Step 4: Simplify right side
    384,809.84x = 114,196,114,711.66
  5. Step 5: Solve for x
    x = 114,196,114,711.66/384,809.84
  6. Step 6: Final answer
    x = 296,759.86

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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.