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Finding the Fourth Proportional to 3,542.90, 4,889 and 1,970.68

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Solution

The fourth proportional to 3,542.90, 4,889 and 1,970.68 is: 2,719.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,542.90 : 4,889 = 1,970.68 : x
  2. Step 2: Convert to fraction form
    3,542.90/4,889 = 1,970.68/x
  3. Step 3: Cross multiply
    3,542.90x = 4,889 × 1,970.68
  4. Step 4: Simplify right side
    3,542.90x = 9,634,654.52
  5. Step 5: Solve for x
    x = 9,634,654.52/3,542.90
  6. Step 6: Final answer
    x = 2,719.43

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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.