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Finding the Fourth Proportional to 282,478.39, 389,887.43 and 161,689.47

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Solution

The fourth proportional to 282,478.39, 389,887.43 and 161,689.47 is: 223,169.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,478.39 : 389,887.43 = 161,689.47 : x
  2. Step 2: Convert to fraction form
    282,478.39/389,887.43 = 161,689.47/x
  3. Step 3: Cross multiply
    282,478.39x = 389,887.43 × 161,689.47
  4. Step 4: Simplify right side
    282,478.39x = 63,040,689,645.84
  5. Step 5: Solve for x
    x = 63,040,689,645.84/282,478.39
  6. Step 6: Final answer
    x = 223,169.96

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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.