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Finding the Fourth Proportional to 287,877.88, 431,713.14 and 121,678.84

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Solution

The fourth proportional to 287,877.88, 431,713.14 and 121,678.84 is: 182,474.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,877.88 : 431,713.14 = 121,678.84 : x
  2. Step 2: Convert to fraction form
    287,877.88/431,713.14 = 121,678.84/x
  3. Step 3: Cross multiply
    287,877.88x = 431,713.14 × 121,678.84
  4. Step 4: Simplify right side
    287,877.88x = 52,530,354,087.96
  5. Step 5: Solve for x
    x = 52,530,354,087.96/287,877.88
  6. Step 6: Final answer
    x = 182,474.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.