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Finding the Fourth Proportional to 287,871.68, 397,261.75 and 158,818.17

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Solution

The fourth proportional to 287,871.68, 397,261.75 and 158,818.17 is: 219,168.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,871.68 : 397,261.75 = 158,818.17 : x
  2. Step 2: Convert to fraction form
    287,871.68/397,261.75 = 158,818.17/x
  3. Step 3: Cross multiply
    287,871.68x = 397,261.75 × 158,818.17
  4. Step 4: Simplify right side
    287,871.68x = 63,092,383,351.91
  5. Step 5: Solve for x
    x = 63,092,383,351.91/287,871.68
  6. Step 6: Final answer
    x = 219,168.43

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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.