Home / 1,213.26-1,819.75-347.50

Finding the Fourth Proportional to 1,213.26, 1,819.75 and 347.50

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Solution

The fourth proportional to 1,213.26, 1,819.75 and 347.50 is: 521.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.26 : 1,819.75 = 347.50 : x
  2. Step 2: Convert to fraction form
    1,213.26/1,819.75 = 347.50/x
  3. Step 3: Cross multiply
    1,213.26x = 1,819.75 × 347.50
  4. Step 4: Simplify right side
    1,213.26x = 632,363.13
  5. Step 5: Solve for x
    x = 632,363.13/1,213.26
  6. Step 6: Final answer
    x = 521.21

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Half scale
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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.