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Finding the Fourth Proportional to 563.10, 775.98 and 405.46

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Solution

The fourth proportional to 563.10, 775.98 and 405.46 is: 558.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.10 : 775.98 = 405.46 : x
  2. Step 2: Convert to fraction form
    563.10/775.98 = 405.46/x
  3. Step 3: Cross multiply
    563.10x = 775.98 × 405.46
  4. Step 4: Simplify right side
    563.10x = 314,625.46
  5. Step 5: Solve for x
    x = 314,625.46/563.10
  6. Step 6: Final answer
    x = 558.74

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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.