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Finding the Fourth Proportional to 4,866.90, 6,715.65 and 2,742.15

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Solution

The fourth proportional to 4,866.90, 6,715.65 and 2,742.15 is: 3,783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,866.90 : 6,715.65 = 2,742.15 : x
  2. Step 2: Convert to fraction form
    4,866.90/6,715.65 = 2,742.15/x
  3. Step 3: Cross multiply
    4,866.90x = 6,715.65 × 2,742.15
  4. Step 4: Simplify right side
    4,866.90x = 18,415,319.65
  5. Step 5: Solve for x
    x = 18,415,319.65/4,866.90
  6. Step 6: Final answer
    x = 3,783.79

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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.