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Finding the Fourth Proportional to 625.99, 863.40 and 404.77

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Solution

The fourth proportional to 625.99, 863.40 and 404.77 is: 558.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.99 : 863.40 = 404.77 : x
  2. Step 2: Convert to fraction form
    625.99/863.40 = 404.77/x
  3. Step 3: Cross multiply
    625.99x = 863.40 × 404.77
  4. Step 4: Simplify right side
    625.99x = 349,478.42
  5. Step 5: Solve for x
    x = 349,478.42/625.99
  6. Step 6: Final answer
    x = 558.28

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1.5x scale

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.