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Finding the Fourth Proportional to 1,377.95, 2,068.74 and 761.94

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Solution

The fourth proportional to 1,377.95, 2,068.74 and 761.94 is: 1,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.95 : 2,068.74 = 761.94 : x
  2. Step 2: Convert to fraction form
    1,377.95/2,068.74 = 761.94/x
  3. Step 3: Cross multiply
    1,377.95x = 2,068.74 × 761.94
  4. Step 4: Simplify right side
    1,377.95x = 1,576,255.76
  5. Step 5: Solve for x
    x = 1,576,255.76/1,377.95
  6. Step 6: Final answer
    x = 1,143.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.