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Finding the Fourth Proportional to 1,642.51, 2,266.86 and 934.61

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Solution

The fourth proportional to 1,642.51, 2,266.86 and 934.61 is: 1,289.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.51 : 2,266.86 = 934.61 : x
  2. Step 2: Convert to fraction form
    1,642.51/2,266.86 = 934.61/x
  3. Step 3: Cross multiply
    1,642.51x = 2,266.86 × 934.61
  4. Step 4: Simplify right side
    1,642.51x = 2,118,625.35
  5. Step 5: Solve for x
    x = 2,118,625.35/1,642.51
  6. Step 6: Final answer
    x = 1,289.87

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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.