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Finding the Fourth Proportional to 613.28, 845.98 and 501.40

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Solution

The fourth proportional to 613.28, 845.98 and 501.40 is: 691.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.28 : 845.98 = 501.40 : x
  2. Step 2: Convert to fraction form
    613.28/845.98 = 501.40/x
  3. Step 3: Cross multiply
    613.28x = 845.98 × 501.40
  4. Step 4: Simplify right side
    613.28x = 424,174.37
  5. Step 5: Solve for x
    x = 424,174.37/613.28
  6. Step 6: Final answer
    x = 691.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.