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Finding the Fourth Proportional to 4,885.28, 6,740.28 and 3,118.64

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Solution

The fourth proportional to 4,885.28, 6,740.28 and 3,118.64 is: 4,302.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,885.28 : 6,740.28 = 3,118.64 : x
  2. Step 2: Convert to fraction form
    4,885.28/6,740.28 = 3,118.64/x
  3. Step 3: Cross multiply
    4,885.28x = 6,740.28 × 3,118.64
  4. Step 4: Simplify right side
    4,885.28x = 21,020,506.82
  5. Step 5: Solve for x
    x = 21,020,506.82/4,885.28
  6. Step 6: Final answer
    x = 4,302.83

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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.