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Finding the Fourth Proportional to 1,366.70, 1,885.97 and 777.23

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Solution

The fourth proportional to 1,366.70, 1,885.97 and 777.23 is: 1,072.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.70 : 1,885.97 = 777.23 : x
  2. Step 2: Convert to fraction form
    1,366.70/1,885.97 = 777.23/x
  3. Step 3: Cross multiply
    1,366.70x = 1,885.97 × 777.23
  4. Step 4: Simplify right side
    1,366.70x = 1,465,819.15
  5. Step 5: Solve for x
    x = 1,465,819.15/1,366.70
  6. Step 6: Final answer
    x = 1,072.53

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1.5x scale

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.