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Finding the Fourth Proportional to 695.80, 957.66 and 555.47

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Solution

The fourth proportional to 695.80, 957.66 and 555.47 is: 764.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.80 : 957.66 = 555.47 : x
  2. Step 2: Convert to fraction form
    695.80/957.66 = 555.47/x
  3. Step 3: Cross multiply
    695.80x = 957.66 × 555.47
  4. Step 4: Simplify right side
    695.80x = 531,948.12
  5. Step 5: Solve for x
    x = 531,948.12/695.80
  6. Step 6: Final answer
    x = 764.51

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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.