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Finding the Fourth Proportional to 943.85, 1,303.60 and 628.59

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Solution

The fourth proportional to 943.85, 1,303.60 and 628.59 is: 868.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.85 : 1,303.60 = 628.59 : x
  2. Step 2: Convert to fraction form
    943.85/1,303.60 = 628.59/x
  3. Step 3: Cross multiply
    943.85x = 1,303.60 × 628.59
  4. Step 4: Simplify right side
    943.85x = 819,432.11
  5. Step 5: Solve for x
    x = 819,432.11/943.85
  6. Step 6: Final answer
    x = 868.18

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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.