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Finding the Fourth Proportional to 1,199.21, 1,656.86 and 934.74

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Solution

The fourth proportional to 1,199.21, 1,656.86 and 934.74 is: 1,291.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.21 : 1,656.86 = 934.74 : x
  2. Step 2: Convert to fraction form
    1,199.21/1,656.86 = 934.74/x
  3. Step 3: Cross multiply
    1,199.21x = 1,656.86 × 934.74
  4. Step 4: Simplify right side
    1,199.21x = 1,548,728.64
  5. Step 5: Solve for x
    x = 1,548,728.64/1,199.21
  6. Step 6: Final answer
    x = 1,291.46

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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.