Home / 1,213.21-1,819.88-347.50

Finding the Fourth Proportional to 1,213.21, 1,819.88 and 347.50

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Solution

The fourth proportional to 1,213.21, 1,819.88 and 347.50 is: 521.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.21 : 1,819.88 = 347.50 : x
  2. Step 2: Convert to fraction form
    1,213.21/1,819.88 = 347.50/x
  3. Step 3: Cross multiply
    1,213.21x = 1,819.88 × 347.50
  4. Step 4: Simplify right side
    1,213.21x = 632,409.17
  5. Step 5: Solve for x
    x = 632,409.17/1,213.21
  6. Step 6: Final answer
    x = 521.27

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Double scale
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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.