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Finding the Fourth Proportional to 4,870.71, 6,721.97 and 2,774.79

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Solution

The fourth proportional to 4,870.71, 6,721.97 and 2,774.79 is: 3,829.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,870.71 : 6,721.97 = 2,774.79 : x
  2. Step 2: Convert to fraction form
    4,870.71/6,721.97 = 2,774.79/x
  3. Step 3: Cross multiply
    4,870.71x = 6,721.97 × 2,774.79
  4. Step 4: Simplify right side
    4,870.71x = 18,652,041.26
  5. Step 5: Solve for x
    x = 18,652,041.26/4,870.71
  6. Step 6: Final answer
    x = 3,829.43

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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.