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Finding the Fourth Proportional to 901.78, 1,244.28 and 569.97

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Solution

The fourth proportional to 901.78, 1,244.28 and 569.97 is: 786.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.78 : 1,244.28 = 569.97 : x
  2. Step 2: Convert to fraction form
    901.78/1,244.28 = 569.97/x
  3. Step 3: Cross multiply
    901.78x = 1,244.28 × 569.97
  4. Step 4: Simplify right side
    901.78x = 709,204.41
  5. Step 5: Solve for x
    x = 709,204.41/901.78
  6. Step 6: Final answer
    x = 786.45

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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.