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Finding the Fourth Proportional to 287,912.59, 397,318.28 and 158,859.11

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Solution

The fourth proportional to 287,912.59, 397,318.28 and 158,859.11 is: 219,224.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,912.59 : 397,318.28 = 158,859.11 : x
  2. Step 2: Convert to fraction form
    287,912.59/397,318.28 = 158,859.11/x
  3. Step 3: Cross multiply
    287,912.59x = 397,318.28 × 158,859.11
  4. Step 4: Simplify right side
    287,912.59x = 63,117,627,205.20
  5. Step 5: Solve for x
    x = 63,117,627,205.20/287,912.59
  6. Step 6: Final answer
    x = 219,224.96

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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.