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Finding the Fourth Proportional to 563.45, 845.10 and 319.95

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Solution

The fourth proportional to 563.45, 845.10 and 319.95 is: 479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.45 : 845.10 = 319.95 : x
  2. Step 2: Convert to fraction form
    563.45/845.10 = 319.95/x
  3. Step 3: Cross multiply
    563.45x = 845.10 × 319.95
  4. Step 4: Simplify right side
    563.45x = 270,389.75
  5. Step 5: Solve for x
    x = 270,389.75/563.45
  6. Step 6: Final answer
    x = 479.89

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Double scale
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Similar ratio
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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.