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Finding the Fourth Proportional to 287,641.51, 396,934.45 and 166,787.89

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Solution

The fourth proportional to 287,641.51, 396,934.45 and 166,787.89 is: 230,161.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,641.51 : 396,934.45 = 166,787.89 : x
  2. Step 2: Convert to fraction form
    287,641.51/396,934.45 = 166,787.89/x
  3. Step 3: Cross multiply
    287,641.51x = 396,934.45 × 166,787.89
  4. Step 4: Simplify right side
    287,641.51x = 66,203,859,383.81
  5. Step 5: Solve for x
    x = 66,203,859,383.81/287,641.51
  6. Step 6: Final answer
    x = 230,161.01

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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.