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Finding the Fourth Proportional to 3,214.58, 4,819.80 and 992.66

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Solution

The fourth proportional to 3,214.58, 4,819.80 and 992.66 is: 1,488.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,214.58 : 4,819.80 = 992.66 : x
  2. Step 2: Convert to fraction form
    3,214.58/4,819.80 = 992.66/x
  3. Step 3: Cross multiply
    3,214.58x = 4,819.80 × 992.66
  4. Step 4: Simplify right side
    3,214.58x = 4,784,422.67
  5. Step 5: Solve for x
    x = 4,784,422.67/3,214.58
  6. Step 6: Final answer
    x = 1,488.35

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1.5x scale

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.