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Finding the Fourth Proportional to 4,918.78, 7,340.13 and 4,393.12

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Solution

The fourth proportional to 4,918.78, 7,340.13 and 4,393.12 is: 6,555.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,918.78 : 7,340.13 = 4,393.12 : x
  2. Step 2: Convert to fraction form
    4,918.78/7,340.13 = 4,393.12/x
  3. Step 3: Cross multiply
    4,918.78x = 7,340.13 × 4,393.12
  4. Step 4: Simplify right side
    4,918.78x = 32,246,071.91
  5. Step 5: Solve for x
    x = 32,246,071.91/4,918.78
  6. Step 6: Final answer
    x = 6,555.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.