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Finding the Fourth Proportional to 563.79, 845.10 and 399.27

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Solution

The fourth proportional to 563.79, 845.10 and 399.27 is: 598.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.79 : 845.10 = 399.27 : x
  2. Step 2: Convert to fraction form
    563.79/845.10 = 399.27/x
  3. Step 3: Cross multiply
    563.79x = 845.10 × 399.27
  4. Step 4: Simplify right side
    563.79x = 337,423.08
  5. Step 5: Solve for x
    x = 337,423.08/563.79
  6. Step 6: Final answer
    x = 598.49

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Double scale
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Similar ratio
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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.