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Finding the Fourth Proportional to 1,277.74, 1,762.68 and 753.58

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Solution

The fourth proportional to 1,277.74, 1,762.68 and 753.58 is: 1,039.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.74 : 1,762.68 = 753.58 : x
  2. Step 2: Convert to fraction form
    1,277.74/1,762.68 = 753.58/x
  3. Step 3: Cross multiply
    1,277.74x = 1,762.68 × 753.58
  4. Step 4: Simplify right side
    1,277.74x = 1,328,320.39
  5. Step 5: Solve for x
    x = 1,328,320.39/1,277.74
  6. Step 6: Final answer
    x = 1,039.59

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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.