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Finding the Fourth Proportional to 2,359.21, 3,539.40 and 898.78

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Solution

The fourth proportional to 2,359.21, 3,539.40 and 898.78 is: 1,348.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,359.21 : 3,539.40 = 898.78 : x
  2. Step 2: Convert to fraction form
    2,359.21/3,539.40 = 898.78/x
  3. Step 3: Cross multiply
    2,359.21x = 3,539.40 × 898.78
  4. Step 4: Simplify right side
    2,359.21x = 3,181,141.93
  5. Step 5: Solve for x
    x = 3,181,141.93/2,359.21
  6. Step 6: Final answer
    x = 1,348.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.