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Finding the Fourth Proportional to 1,174.45, 1,620.03 and 776.12

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Solution

The fourth proportional to 1,174.45, 1,620.03 and 776.12 is: 1,070.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.45 : 1,620.03 = 776.12 : x
  2. Step 2: Convert to fraction form
    1,174.45/1,620.03 = 776.12/x
  3. Step 3: Cross multiply
    1,174.45x = 1,620.03 × 776.12
  4. Step 4: Simplify right side
    1,174.45x = 1,257,337.68
  5. Step 5: Solve for x
    x = 1,257,337.68/1,174.45
  6. Step 6: Final answer
    x = 1,070.58

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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.