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Finding the Fourth Proportional to 563.36, 776.60 and 423.48

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Solution

The fourth proportional to 563.36, 776.60 and 423.48 is: 583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.36 : 776.60 = 423.48 : x
  2. Step 2: Convert to fraction form
    563.36/776.60 = 423.48/x
  3. Step 3: Cross multiply
    563.36x = 776.60 × 423.48
  4. Step 4: Simplify right side
    563.36x = 328,872.45
  5. Step 5: Solve for x
    x = 328,872.45/563.36
  6. Step 6: Final answer
    x = 583.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.