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Finding the Fourth Proportional to 1,366.74, 1,885.89 and 777.06

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Solution

The fourth proportional to 1,366.74, 1,885.89 and 777.06 is: 1,072.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.74 : 1,885.89 = 777.06 : x
  2. Step 2: Convert to fraction form
    1,366.74/1,885.89 = 777.06/x
  3. Step 3: Cross multiply
    1,366.74x = 1,885.89 × 777.06
  4. Step 4: Simplify right side
    1,366.74x = 1,465,449.68
  5. Step 5: Solve for x
    x = 1,465,449.68/1,366.74
  6. Step 6: Final answer
    x = 1,072.22

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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.