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Finding the Fourth Proportional to 1,377, 2,065.50 and 1,307.79

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Solution

The fourth proportional to 1,377, 2,065.50 and 1,307.79 is: 1,961.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377 : 2,065.50 = 1,307.79 : x
  2. Step 2: Convert to fraction form
    1,377/2,065.50 = 1,307.79/x
  3. Step 3: Cross multiply
    1,377x = 2,065.50 × 1,307.79
  4. Step 4: Simplify right side
    1,377x = 2,701,240.25
  5. Step 5: Solve for x
    x = 2,701,240.25/1,377
  6. Step 6: Final answer
    x = 1,961.69

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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.