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Finding the Fourth Proportional to 289,661.69, 399,756.72 and 160,612.97

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Solution

The fourth proportional to 289,661.69, 399,756.72 and 160,612.97 is: 221,658.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,661.69 : 399,756.72 = 160,612.97 : x
  2. Step 2: Convert to fraction form
    289,661.69/399,756.72 = 160,612.97/x
  3. Step 3: Cross multiply
    289,661.69x = 399,756.72 × 160,612.97
  4. Step 4: Simplify right side
    289,661.69x = 64,206,112,077.87
  5. Step 5: Solve for x
    x = 64,206,112,077.87/289,661.69
  6. Step 6: Final answer
    x = 221,658.97

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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.