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Finding the Fourth Proportional to 410.21, 558.98 and 408.77

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Solution

The fourth proportional to 410.21, 558.98 and 408.77 is: 557.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.21 : 558.98 = 408.77 : x
  2. Step 2: Convert to fraction form
    410.21/558.98 = 408.77/x
  3. Step 3: Cross multiply
    410.21x = 558.98 × 408.77
  4. Step 4: Simplify right side
    410.21x = 228,494.25
  5. Step 5: Solve for x
    x = 228,494.25/410.21
  6. Step 6: Final answer
    x = 557.02

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.