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Finding the Fourth Proportional to 943.60, 1,301.52 and 777.55

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Solution

The fourth proportional to 943.60, 1,301.52 and 777.55 is: 1,072.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.60 : 1,301.52 = 777.55 : x
  2. Step 2: Convert to fraction form
    943.60/1,301.52 = 777.55/x
  3. Step 3: Cross multiply
    943.60x = 1,301.52 × 777.55
  4. Step 4: Simplify right side
    943.60x = 1,011,996.88
  5. Step 5: Solve for x
    x = 1,011,996.88/943.60
  6. Step 6: Final answer
    x = 1,072.49

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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.