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Finding the Fourth Proportional to 6,390.78, 9,586.20 and 2,230.77

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Solution

The fourth proportional to 6,390.78, 9,586.20 and 2,230.77 is: 3,346.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.78 : 9,586.20 = 2,230.77 : x
  2. Step 2: Convert to fraction form
    6,390.78/9,586.20 = 2,230.77/x
  3. Step 3: Cross multiply
    6,390.78x = 9,586.20 × 2,230.77
  4. Step 4: Simplify right side
    6,390.78x = 21,384,607.37
  5. Step 5: Solve for x
    x = 21,384,607.37/6,390.78
  6. Step 6: Final answer
    x = 3,346.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.