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Finding the Fourth Proportional to 514.34, 770.76 and 390.41

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Solution

The fourth proportional to 514.34, 770.76 and 390.41 is: 585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.34 : 770.76 = 390.41 : x
  2. Step 2: Convert to fraction form
    514.34/770.76 = 390.41/x
  3. Step 3: Cross multiply
    514.34x = 770.76 × 390.41
  4. Step 4: Simplify right side
    514.34x = 300,912.41
  5. Step 5: Solve for x
    x = 300,912.41/514.34
  6. Step 6: Final answer
    x = 585.05

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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.