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Finding the Fourth Proportional to 540.26, 811.76 and 345.35

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Solution

The fourth proportional to 540.26, 811.76 and 345.35 is: 518.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.26 : 811.76 = 345.35 : x
  2. Step 2: Convert to fraction form
    540.26/811.76 = 345.35/x
  3. Step 3: Cross multiply
    540.26x = 811.76 × 345.35
  4. Step 4: Simplify right side
    540.26x = 280,341.32
  5. Step 5: Solve for x
    x = 280,341.32/540.26
  6. Step 6: Final answer
    x = 518.90

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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.