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Finding the Fourth Proportional to 1,366.34, 1,885.55 and 777.02

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Solution

The fourth proportional to 1,366.34, 1,885.55 and 777.02 is: 1,072.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.34 : 1,885.55 = 777.02 : x
  2. Step 2: Convert to fraction form
    1,366.34/1,885.55 = 777.02/x
  3. Step 3: Cross multiply
    1,366.34x = 1,885.55 × 777.02
  4. Step 4: Simplify right side
    1,366.34x = 1,465,096.75
  5. Step 5: Solve for x
    x = 1,465,096.75/1,366.34
  6. Step 6: Final answer
    x = 1,072.28

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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.