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Finding the Fourth Proportional to 287,765.43, 397,139.97 and 158,729.19

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Solution

The fourth proportional to 287,765.43, 397,139.97 and 158,729.19 is: 219,059.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,765.43 : 397,139.97 = 158,729.19 : x
  2. Step 2: Convert to fraction form
    287,765.43/397,139.97 = 158,729.19/x
  3. Step 3: Cross multiply
    287,765.43x = 397,139.97 × 158,729.19
  4. Step 4: Simplify right side
    287,765.43x = 63,037,705,754.72
  5. Step 5: Solve for x
    x = 63,037,705,754.72/287,765.43
  6. Step 6: Final answer
    x = 219,059.34

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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.