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Finding the Fourth Proportional to 1,277.14, 1,762.78 and 753.34

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Solution

The fourth proportional to 1,277.14, 1,762.78 and 753.34 is: 1,039.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.14 : 1,762.78 = 753.34 : x
  2. Step 2: Convert to fraction form
    1,277.14/1,762.78 = 753.34/x
  3. Step 3: Cross multiply
    1,277.14x = 1,762.78 × 753.34
  4. Step 4: Simplify right side
    1,277.14x = 1,327,972.69
  5. Step 5: Solve for x
    x = 1,327,972.69/1,277.14
  6. Step 6: Final answer
    x = 1,039.80

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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.