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Finding the Fourth Proportional to 1,356.60, 2,033.70 and 490.74

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Solution

The fourth proportional to 1,356.60, 2,033.70 and 490.74 is: 735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.60 : 2,033.70 = 490.74 : x
  2. Step 2: Convert to fraction form
    1,356.60/2,033.70 = 490.74/x
  3. Step 3: Cross multiply
    1,356.60x = 2,033.70 × 490.74
  4. Step 4: Simplify right side
    1,356.60x = 998,017.94
  5. Step 5: Solve for x
    x = 998,017.94/1,356.60
  6. Step 6: Final answer
    x = 735.68

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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.