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Finding the Fourth Proportional to 1,204.05, 1,661.68 and 761.59

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Solution

The fourth proportional to 1,204.05, 1,661.68 and 761.59 is: 1,051.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.05 : 1,661.68 = 761.59 : x
  2. Step 2: Convert to fraction form
    1,204.05/1,661.68 = 761.59/x
  3. Step 3: Cross multiply
    1,204.05x = 1,661.68 × 761.59
  4. Step 4: Simplify right side
    1,204.05x = 1,265,518.87
  5. Step 5: Solve for x
    x = 1,265,518.87/1,204.05
  6. Step 6: Final answer
    x = 1,051.05

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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.