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Finding the Fourth Proportional to 613.88, 919.58 and 304.79

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Solution

The fourth proportional to 613.88, 919.58 and 304.79 is: 456.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.88 : 919.58 = 304.79 : x
  2. Step 2: Convert to fraction form
    613.88/919.58 = 304.79/x
  3. Step 3: Cross multiply
    613.88x = 919.58 × 304.79
  4. Step 4: Simplify right side
    613.88x = 280,281.28
  5. Step 5: Solve for x
    x = 280,281.28/613.88
  6. Step 6: Final answer
    x = 456.58

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1.5x scale

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.