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Finding the Fourth Proportional to 1,642.79, 2,266.95 and 934.63

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Solution

The fourth proportional to 1,642.79, 2,266.95 and 934.63 is: 1,289.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.79 : 2,266.95 = 934.63 : x
  2. Step 2: Convert to fraction form
    1,642.79/2,266.95 = 934.63/x
  3. Step 3: Cross multiply
    1,642.79x = 2,266.95 × 934.63
  4. Step 4: Simplify right side
    1,642.79x = 2,118,753.81
  5. Step 5: Solve for x
    x = 2,118,753.81/1,642.79
  6. Step 6: Final answer
    x = 1,289.73

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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.