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Finding the Fourth Proportional to 613.13, 920.41 and 288.52

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Solution

The fourth proportional to 613.13, 920.41 and 288.52 is: 433.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.13 : 920.41 = 288.52 : x
  2. Step 2: Convert to fraction form
    613.13/920.41 = 288.52/x
  3. Step 3: Cross multiply
    613.13x = 920.41 × 288.52
  4. Step 4: Simplify right side
    613.13x = 265,553.67
  5. Step 5: Solve for x
    x = 265,553.67/613.13
  6. Step 6: Final answer
    x = 433.12

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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.