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Finding the Fourth Proportional to 5,479.68, 8,220.48 and 2,556.48

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Solution

The fourth proportional to 5,479.68, 8,220.48 and 2,556.48 is: 3,835.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.68 : 8,220.48 = 2,556.48 : x
  2. Step 2: Convert to fraction form
    5,479.68/8,220.48 = 2,556.48/x
  3. Step 3: Cross multiply
    5,479.68x = 8,220.48 × 2,556.48
  4. Step 4: Simplify right side
    5,479.68x = 21,015,492.71
  5. Step 5: Solve for x
    x = 21,015,492.71/5,479.68
  6. Step 6: Final answer
    x = 3,835.17

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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.