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Finding the Fourth Proportional to 1,294.57, 1,940.64 and 563.95

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Solution

The fourth proportional to 1,294.57, 1,940.64 and 563.95 is: 845.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.57 : 1,940.64 = 563.95 : x
  2. Step 2: Convert to fraction form
    1,294.57/1,940.64 = 563.95/x
  3. Step 3: Cross multiply
    1,294.57x = 1,940.64 × 563.95
  4. Step 4: Simplify right side
    1,294.57x = 1,094,423.93
  5. Step 5: Solve for x
    x = 1,094,423.93/1,294.57
  6. Step 6: Final answer
    x = 845.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.