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Finding the Fourth Proportional to 810.30, 1,215.44 and 233.18

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Solution

The fourth proportional to 810.30, 1,215.44 and 233.18 is: 349.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.30 : 1,215.44 = 233.18 : x
  2. Step 2: Convert to fraction form
    810.30/1,215.44 = 233.18/x
  3. Step 3: Cross multiply
    810.30x = 1,215.44 × 233.18
  4. Step 4: Simplify right side
    810.30x = 283,416.30
  5. Step 5: Solve for x
    x = 283,416.30/810.30
  6. Step 6: Final answer
    x = 349.77

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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.