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Finding the Fourth Proportional to 5,579.79, 7,680.78 and 4,823.22

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Solution

The fourth proportional to 5,579.79, 7,680.78 and 4,823.22 is: 6,639.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,579.79 : 7,680.78 = 4,823.22 : x
  2. Step 2: Convert to fraction form
    5,579.79/7,680.78 = 4,823.22/x
  3. Step 3: Cross multiply
    5,579.79x = 7,680.78 × 4,823.22
  4. Step 4: Simplify right side
    5,579.79x = 37,046,091.71
  5. Step 5: Solve for x
    x = 37,046,091.71/5,579.79
  6. Step 6: Final answer
    x = 6,639.33

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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.