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Finding the Fourth Proportional to 1,159.40, 1,736.86 and 644.84

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Solution

The fourth proportional to 1,159.40, 1,736.86 and 644.84 is: 966.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.40 : 1,736.86 = 644.84 : x
  2. Step 2: Convert to fraction form
    1,159.40/1,736.86 = 644.84/x
  3. Step 3: Cross multiply
    1,159.40x = 1,736.86 × 644.84
  4. Step 4: Simplify right side
    1,159.40x = 1,119,996.80
  5. Step 5: Solve for x
    x = 1,119,996.80/1,159.40
  6. Step 6: Final answer
    x = 966.01

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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.