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Finding the Fourth Proportional to 287,999.66, 397,439.78 and 160,675.28

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Solution

The fourth proportional to 287,999.66, 397,439.78 and 160,675.28 is: 221,732.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,999.66 : 397,439.78 = 160,675.28 : x
  2. Step 2: Convert to fraction form
    287,999.66/397,439.78 = 160,675.28/x
  3. Step 3: Cross multiply
    287,999.66x = 397,439.78 × 160,675.28
  4. Step 4: Simplify right side
    287,999.66x = 63,858,747,934.64
  5. Step 5: Solve for x
    x = 63,858,747,934.64/287,999.66
  6. Step 6: Final answer
    x = 221,732.03

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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.