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Finding the Fourth Proportional to 1,175.13, 1,621.62 and 651.15

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Solution

The fourth proportional to 1,175.13, 1,621.62 and 651.15 is: 898.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.13 : 1,621.62 = 651.15 : x
  2. Step 2: Convert to fraction form
    1,175.13/1,621.62 = 651.15/x
  3. Step 3: Cross multiply
    1,175.13x = 1,621.62 × 651.15
  4. Step 4: Simplify right side
    1,175.13x = 1,055,917.86
  5. Step 5: Solve for x
    x = 1,055,917.86/1,175.13
  6. Step 6: Final answer
    x = 898.55

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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.