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Finding the Fourth Proportional to 287,921.04, 397,361.88 and 160,640.88

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Solution

The fourth proportional to 287,921.04, 397,361.88 and 160,640.88 is: 221,701.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,921.04 : 397,361.88 = 160,640.88 : x
  2. Step 2: Convert to fraction form
    287,921.04/397,361.88 = 160,640.88/x
  3. Step 3: Cross multiply
    287,921.04x = 397,361.88 × 160,640.88
  4. Step 4: Simplify right side
    287,921.04x = 63,832,562,081.65
  5. Step 5: Solve for x
    x = 63,832,562,081.65/287,921.04
  6. Step 6: Final answer
    x = 221,701.62

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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.