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Finding the Fourth Proportional to 770.04, 1,153.98 and 513

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Solution

The fourth proportional to 770.04, 1,153.98 and 513 is: 768.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.04 : 1,153.98 = 513 : x
  2. Step 2: Convert to fraction form
    770.04/1,153.98 = 513/x
  3. Step 3: Cross multiply
    770.04x = 1,153.98 × 513
  4. Step 4: Simplify right side
    770.04x = 591,991.74
  5. Step 5: Solve for x
    x = 591,991.74/770.04
  6. Step 6: Final answer
    x = 768.78

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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.