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Finding the Fourth Proportional to 4,861, 7,291.52 and 1,213

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Solution

The fourth proportional to 4,861, 7,291.52 and 1,213 is: 1,819.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,861 : 7,291.52 = 1,213 : x
  2. Step 2: Convert to fraction form
    4,861/7,291.52 = 1,213/x
  3. Step 3: Cross multiply
    4,861x = 7,291.52 × 1,213
  4. Step 4: Simplify right side
    4,861x = 8,844,613.76
  5. Step 5: Solve for x
    x = 8,844,613.76/4,861
  6. Step 6: Final answer
    x = 1,819.50

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Double scale
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Similar ratio
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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.