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Finding the Fourth Proportional to 287,958.72, 397,379.16 and 160,636.44

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Solution

The fourth proportional to 287,958.72, 397,379.16 and 160,636.44 is: 221,676.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,958.72 : 397,379.16 = 160,636.44 : x
  2. Step 2: Convert to fraction form
    287,958.72/397,379.16 = 160,636.44/x
  3. Step 3: Cross multiply
    287,958.72x = 397,379.16 × 160,636.44
  4. Step 4: Simplify right side
    287,958.72x = 63,833,573,592.59
  5. Step 5: Solve for x
    x = 63,833,573,592.59/287,958.72
  6. Step 6: Final answer
    x = 221,676.13

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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.