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Finding the Fourth Proportional to 4,978.29, 6,869.88 and 2,740.17

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Solution

The fourth proportional to 4,978.29, 6,869.88 and 2,740.17 is: 3,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.29 : 6,869.88 = 2,740.17 : x
  2. Step 2: Convert to fraction form
    4,978.29/6,869.88 = 2,740.17/x
  3. Step 3: Cross multiply
    4,978.29x = 6,869.88 × 2,740.17
  4. Step 4: Simplify right side
    4,978.29x = 18,824,639.08
  5. Step 5: Solve for x
    x = 18,824,639.08/4,978.29
  6. Step 6: Final answer
    x = 3,781.35

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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.