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Finding the Fourth Proportional to 901.62, 1,243.65 and 569.79

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Solution

The fourth proportional to 901.62, 1,243.65 and 569.79 is: 785.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.62 : 1,243.65 = 569.79 : x
  2. Step 2: Convert to fraction form
    901.62/1,243.65 = 569.79/x
  3. Step 3: Cross multiply
    901.62x = 1,243.65 × 569.79
  4. Step 4: Simplify right side
    901.62x = 708,619.33
  5. Step 5: Solve for x
    x = 708,619.33/901.62
  6. Step 6: Final answer
    x = 785.94

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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.