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Finding the Fourth Proportional to 1,213.65, 1,819.94 and 347.76

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Solution

The fourth proportional to 1,213.65, 1,819.94 and 347.76 is: 521.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.65 : 1,819.94 = 347.76 : x
  2. Step 2: Convert to fraction form
    1,213.65/1,819.94 = 347.76/x
  3. Step 3: Cross multiply
    1,213.65x = 1,819.94 × 347.76
  4. Step 4: Simplify right side
    1,213.65x = 632,900.60
  5. Step 5: Solve for x
    x = 632,900.60/1,213.65
  6. Step 6: Final answer
    x = 521.49

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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.