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Finding the Fourth Proportional to 1,221.84, 1,832.78 and 606.32

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Solution

The fourth proportional to 1,221.84, 1,832.78 and 606.32 is: 909.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.84 : 1,832.78 = 606.32 : x
  2. Step 2: Convert to fraction form
    1,221.84/1,832.78 = 606.32/x
  3. Step 3: Cross multiply
    1,221.84x = 1,832.78 × 606.32
  4. Step 4: Simplify right side
    1,221.84x = 1,111,251.17
  5. Step 5: Solve for x
    x = 1,111,251.17/1,221.84
  6. Step 6: Final answer
    x = 909.49

Related Problems

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Half scale
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Double scale
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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.