Home / 1,214.22-1,821.38-336.72

Finding the Fourth Proportional to 1,214.22, 1,821.38 and 336.72

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Solution

The fourth proportional to 1,214.22, 1,821.38 and 336.72 is: 505.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.22 : 1,821.38 = 336.72 : x
  2. Step 2: Convert to fraction form
    1,214.22/1,821.38 = 336.72/x
  3. Step 3: Cross multiply
    1,214.22x = 1,821.38 × 336.72
  4. Step 4: Simplify right side
    1,214.22x = 613,300.22
  5. Step 5: Solve for x
    x = 613,300.22/1,214.22
  6. Step 6: Final answer
    x = 505.10

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,215.22, 1,822.88 and 337.72
Similar ratio
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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.