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Finding the Fourth Proportional to 6,678.72, 9,208.08 and 4,579.20

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Solution

The fourth proportional to 6,678.72, 9,208.08 and 4,579.20 is: 6,313.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,678.72 : 9,208.08 = 4,579.20 : x
  2. Step 2: Convert to fraction form
    6,678.72/9,208.08 = 4,579.20/x
  3. Step 3: Cross multiply
    6,678.72x = 9,208.08 × 4,579.20
  4. Step 4: Simplify right side
    6,678.72x = 42,165,639.94
  5. Step 5: Solve for x
    x = 42,165,639.94/6,678.72
  6. Step 6: Final answer
    x = 6,313.43

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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.