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Finding the Fourth Proportional to 1,277.84, 1,763.39 and 753.86

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Solution

The fourth proportional to 1,277.84, 1,763.39 and 753.86 is: 1,040.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.84 : 1,763.39 = 753.86 : x
  2. Step 2: Convert to fraction form
    1,277.84/1,763.39 = 753.86/x
  3. Step 3: Cross multiply
    1,277.84x = 1,763.39 × 753.86
  4. Step 4: Simplify right side
    1,277.84x = 1,329,342.25
  5. Step 5: Solve for x
    x = 1,329,342.25/1,277.84
  6. Step 6: Final answer
    x = 1,040.31

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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.