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Finding the Fourth Proportional to 843.47, 1,263.45 and 495.75

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Solution

The fourth proportional to 843.47, 1,263.45 and 495.75 is: 742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.47 : 1,263.45 = 495.75 : x
  2. Step 2: Convert to fraction form
    843.47/1,263.45 = 495.75/x
  3. Step 3: Cross multiply
    843.47x = 1,263.45 × 495.75
  4. Step 4: Simplify right side
    843.47x = 626,355.34
  5. Step 5: Solve for x
    x = 626,355.34/843.47
  6. Step 6: Final answer
    x = 742.60

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1.5x scale

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.