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Finding the Fourth Proportional to 1,359.21, 2,039.37 and 493.59

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Solution

The fourth proportional to 1,359.21, 2,039.37 and 493.59 is: 740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.21 : 2,039.37 = 493.59 : x
  2. Step 2: Convert to fraction form
    1,359.21/2,039.37 = 493.59/x
  3. Step 3: Cross multiply
    1,359.21x = 2,039.37 × 493.59
  4. Step 4: Simplify right side
    1,359.21x = 1,006,612.64
  5. Step 5: Solve for x
    x = 1,006,612.64/1,359.21
  6. Step 6: Final answer
    x = 740.59

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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.