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Finding the Fourth Proportional to 5,579.52, 7,680 and 4,918.08

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Solution

The fourth proportional to 5,579.52, 7,680 and 4,918.08 is: 6,769.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,579.52 : 7,680 = 4,918.08 : x
  2. Step 2: Convert to fraction form
    5,579.52/7,680 = 4,918.08/x
  3. Step 3: Cross multiply
    5,579.52x = 7,680 × 4,918.08
  4. Step 4: Simplify right side
    5,579.52x = 37,770,854.40
  5. Step 5: Solve for x
    x = 37,770,854.40/5,579.52
  6. Step 6: Final answer
    x = 6,769.55

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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.