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Finding the Fourth Proportional to 695.05, 959.13 and 400.30

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Solution

The fourth proportional to 695.05, 959.13 and 400.30 is: 552.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.05 : 959.13 = 400.30 : x
  2. Step 2: Convert to fraction form
    695.05/959.13 = 400.30/x
  3. Step 3: Cross multiply
    695.05x = 959.13 × 400.30
  4. Step 4: Simplify right side
    695.05x = 383,939.74
  5. Step 5: Solve for x
    x = 383,939.74/695.05
  6. Step 6: Final answer
    x = 552.39

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1.5x scale

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.