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Finding the Fourth Proportional to 540.34, 810.39 and 312.34

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Solution

The fourth proportional to 540.34, 810.39 and 312.34 is: 468.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.34 : 810.39 = 312.34 : x
  2. Step 2: Convert to fraction form
    540.34/810.39 = 312.34/x
  3. Step 3: Cross multiply
    540.34x = 810.39 × 312.34
  4. Step 4: Simplify right side
    540.34x = 253,117.21
  5. Step 5: Solve for x
    x = 253,117.21/540.34
  6. Step 6: Final answer
    x = 468.44

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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.