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Finding the Fourth Proportional to 513.17, 770.29 and 455.76

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Solution

The fourth proportional to 513.17, 770.29 and 455.76 is: 684.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.17 : 770.29 = 455.76 : x
  2. Step 2: Convert to fraction form
    513.17/770.29 = 455.76/x
  3. Step 3: Cross multiply
    513.17x = 770.29 × 455.76
  4. Step 4: Simplify right side
    513.17x = 351,068.79
  5. Step 5: Solve for x
    x = 351,068.79/513.17
  6. Step 6: Final answer
    x = 684.12

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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.