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Finding the Fourth Proportional to 1,577.65, 2,176.68 and 914.48

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Solution

The fourth proportional to 1,577.65, 2,176.68 and 914.48 is: 1,261.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.65 : 2,176.68 = 914.48 : x
  2. Step 2: Convert to fraction form
    1,577.65/2,176.68 = 914.48/x
  3. Step 3: Cross multiply
    1,577.65x = 2,176.68 × 914.48
  4. Step 4: Simplify right side
    1,577.65x = 1,990,530.33
  5. Step 5: Solve for x
    x = 1,990,530.33/1,577.65
  6. Step 6: Final answer
    x = 1,261.71

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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.