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Finding the Fourth Proportional to 5,278.05, 7,278.93 and 4,739.40

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Solution

The fourth proportional to 5,278.05, 7,278.93 and 4,739.40 is: 6,536.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.05 : 7,278.93 = 4,739.40 : x
  2. Step 2: Convert to fraction form
    5,278.05/7,278.93 = 4,739.40/x
  3. Step 3: Cross multiply
    5,278.05x = 7,278.93 × 4,739.40
  4. Step 4: Simplify right side
    5,278.05x = 34,497,760.84
  5. Step 5: Solve for x
    x = 34,497,760.84/5,278.05
  6. Step 6: Final answer
    x = 6,536.08

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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.