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Finding the Fourth Proportional to 613.60, 918.30 and 370.30

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Solution

The fourth proportional to 613.60, 918.30 and 370.30 is: 554.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.60 : 918.30 = 370.30 : x
  2. Step 2: Convert to fraction form
    613.60/918.30 = 370.30/x
  3. Step 3: Cross multiply
    613.60x = 918.30 × 370.30
  4. Step 4: Simplify right side
    613.60x = 340,046.49
  5. Step 5: Solve for x
    x = 340,046.49/613.60
  6. Step 6: Final answer
    x = 554.18

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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.