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Finding the Fourth Proportional to 614.25, 847.80 and 404.77

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Solution

The fourth proportional to 614.25, 847.80 and 404.77 is: 558.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.25 : 847.80 = 404.77 : x
  2. Step 2: Convert to fraction form
    614.25/847.80 = 404.77/x
  3. Step 3: Cross multiply
    614.25x = 847.80 × 404.77
  4. Step 4: Simplify right side
    614.25x = 343,157.74
  5. Step 5: Solve for x
    x = 343,157.74/614.25
  6. Step 6: Final answer
    x = 558.66

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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.