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Finding the Fourth Proportional to 287,740.86, 397,073.84 and 158,679.33

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Solution

The fourth proportional to 287,740.86, 397,073.84 and 158,679.33 is: 218,972.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,740.86 : 397,073.84 = 158,679.33 : x
  2. Step 2: Convert to fraction form
    287,740.86/397,073.84 = 158,679.33/x
  3. Step 3: Cross multiply
    287,740.86x = 397,073.84 × 158,679.33
  4. Step 4: Simplify right side
    287,740.86x = 63,007,410,098.33
  5. Step 5: Solve for x
    x = 63,007,410,098.33/287,740.86
  6. Step 6: Final answer
    x = 218,972.76

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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.