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Finding the Fourth Proportional to 5,231.16, 7,215.12 and 4,917.78

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Solution

The fourth proportional to 5,231.16, 7,215.12 and 4,917.78 is: 6,782.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,231.16 : 7,215.12 = 4,917.78 : x
  2. Step 2: Convert to fraction form
    5,231.16/7,215.12 = 4,917.78/x
  3. Step 3: Cross multiply
    5,231.16x = 7,215.12 × 4,917.78
  4. Step 4: Simplify right side
    5,231.16x = 35,482,372.83
  5. Step 5: Solve for x
    x = 35,482,372.83/5,231.16
  6. Step 6: Final answer
    x = 6,782.89

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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.