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Finding the Fourth Proportional to 1,765.40, 2,429.10 and 1,449.50

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Solution

The fourth proportional to 1,765.40, 2,429.10 and 1,449.50 is: 1,994.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.40 : 2,429.10 = 1,449.50 : x
  2. Step 2: Convert to fraction form
    1,765.40/2,429.10 = 1,449.50/x
  3. Step 3: Cross multiply
    1,765.40x = 2,429.10 × 1,449.50
  4. Step 4: Simplify right side
    1,765.40x = 3,520,980.45
  5. Step 5: Solve for x
    x = 3,520,980.45/1,765.40
  6. Step 6: Final answer
    x = 1,994.44

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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.