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Finding the Fourth Proportional to 695.33, 1,043.03 and 386.95

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Solution

The fourth proportional to 695.33, 1,043.03 and 386.95 is: 580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.33 : 1,043.03 = 386.95 : x
  2. Step 2: Convert to fraction form
    695.33/1,043.03 = 386.95/x
  3. Step 3: Cross multiply
    695.33x = 1,043.03 × 386.95
  4. Step 4: Simplify right side
    695.33x = 403,605.32
  5. Step 5: Solve for x
    x = 403,605.32/695.33
  6. Step 6: Final answer
    x = 580.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.