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Finding the Fourth Proportional to 3,809.79, 5,258.16 and 2,817.93

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Solution

The fourth proportional to 3,809.79, 5,258.16 and 2,817.93 is: 3,889.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.79 : 5,258.16 = 2,817.93 : x
  2. Step 2: Convert to fraction form
    3,809.79/5,258.16 = 2,817.93/x
  3. Step 3: Cross multiply
    3,809.79x = 5,258.16 × 2,817.93
  4. Step 4: Simplify right side
    3,809.79x = 14,817,126.81
  5. Step 5: Solve for x
    x = 14,817,126.81/3,809.79
  6. Step 6: Final answer
    x = 3,889.22

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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.