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Finding the Fourth Proportional to 3,490.76, 4,812.18 and 2,991.08

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Solution

The fourth proportional to 3,490.76, 4,812.18 and 2,991.08 is: 4,123.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.76 : 4,812.18 = 2,991.08 : x
  2. Step 2: Convert to fraction form
    3,490.76/4,812.18 = 2,991.08/x
  3. Step 3: Cross multiply
    3,490.76x = 4,812.18 × 2,991.08
  4. Step 4: Simplify right side
    3,490.76x = 14,393,615.35
  5. Step 5: Solve for x
    x = 14,393,615.35/3,490.76
  6. Step 6: Final answer
    x = 4,123.35

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Double scale
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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.