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Finding the Fourth Proportional to 3,573.78, 4,931.79 and 2,002.20

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Solution

The fourth proportional to 3,573.78, 4,931.79 and 2,002.20 is: 2,763.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,573.78 : 4,931.79 = 2,002.20 : x
  2. Step 2: Convert to fraction form
    3,573.78/4,931.79 = 2,002.20/x
  3. Step 3: Cross multiply
    3,573.78x = 4,931.79 × 2,002.20
  4. Step 4: Simplify right side
    3,573.78x = 9,874,429.94
  5. Step 5: Solve for x
    x = 9,874,429.94/3,573.78
  6. Step 6: Final answer
    x = 2,763.02

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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.