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Finding the Fourth Proportional to 3,798.64, 5,242.79 and 2,455.90

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Solution

The fourth proportional to 3,798.64, 5,242.79 and 2,455.90 is: 3,389.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,798.64 : 5,242.79 = 2,455.90 : x
  2. Step 2: Convert to fraction form
    3,798.64/5,242.79 = 2,455.90/x
  3. Step 3: Cross multiply
    3,798.64x = 5,242.79 × 2,455.90
  4. Step 4: Simplify right side
    3,798.64x = 12,875,729.47
  5. Step 5: Solve for x
    x = 12,875,729.47/3,798.64
  6. Step 6: Final answer
    x = 3,389.57

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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.