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Finding the Fourth Proportional to 901.10, 1,242.78 and 568.94

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Solution

The fourth proportional to 901.10, 1,242.78 and 568.94 is: 784.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.10 : 1,242.78 = 568.94 : x
  2. Step 2: Convert to fraction form
    901.10/1,242.78 = 568.94/x
  3. Step 3: Cross multiply
    901.10x = 1,242.78 × 568.94
  4. Step 4: Simplify right side
    901.10x = 707,067.25
  5. Step 5: Solve for x
    x = 707,067.25/901.10
  6. Step 6: Final answer
    x = 784.67

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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.