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Finding the Fourth Proportional to 540.68, 811.08 and 405.44

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Solution

The fourth proportional to 540.68, 811.08 and 405.44 is: 608.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.68 : 811.08 = 405.44 : x
  2. Step 2: Convert to fraction form
    540.68/811.08 = 405.44/x
  3. Step 3: Cross multiply
    540.68x = 811.08 × 405.44
  4. Step 4: Simplify right side
    540.68x = 328,844.28
  5. Step 5: Solve for x
    x = 328,844.28/540.68
  6. Step 6: Final answer
    x = 608.20

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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.