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Finding the Fourth Proportional to 287,938, 397,354.80 and 160,621.66

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Solution

The fourth proportional to 287,938, 397,354.80 and 160,621.66 is: 221,658.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,938 : 397,354.80 = 160,621.66 : x
  2. Step 2: Convert to fraction form
    287,938/397,354.80 = 160,621.66/x
  3. Step 3: Cross multiply
    287,938x = 397,354.80 × 160,621.66
  4. Step 4: Simplify right side
    287,938x = 63,823,787,584.97
  5. Step 5: Solve for x
    x = 63,823,787,584.97/287,938
  6. Step 6: Final answer
    x = 221,658.09

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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.