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Finding the Fourth Proportional to 545.98, 816.90 and 513.16

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Solution

The fourth proportional to 545.98, 816.90 and 513.16 is: 767.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.98 : 816.90 = 513.16 : x
  2. Step 2: Convert to fraction form
    545.98/816.90 = 513.16/x
  3. Step 3: Cross multiply
    545.98x = 816.90 × 513.16
  4. Step 4: Simplify right side
    545.98x = 419,200.40
  5. Step 5: Solve for x
    x = 419,200.40/545.98
  6. Step 6: Final answer
    x = 767.79

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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.