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Finding the Fourth Proportional to 1,640.15, 2,264.47 and 1,266.47

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Solution

The fourth proportional to 1,640.15, 2,264.47 and 1,266.47 is: 1,748.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.15 : 2,264.47 = 1,266.47 : x
  2. Step 2: Convert to fraction form
    1,640.15/2,264.47 = 1,266.47/x
  3. Step 3: Cross multiply
    1,640.15x = 2,264.47 × 1,266.47
  4. Step 4: Simplify right side
    1,640.15x = 2,867,868.83
  5. Step 5: Solve for x
    x = 2,867,868.83/1,640.15
  6. Step 6: Final answer
    x = 1,748.55

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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.