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Finding the Fourth Proportional to 695.72, 959.90 and 430.20

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Solution

The fourth proportional to 695.72, 959.90 and 430.20 is: 593.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.72 : 959.90 = 430.20 : x
  2. Step 2: Convert to fraction form
    695.72/959.90 = 430.20/x
  3. Step 3: Cross multiply
    695.72x = 959.90 × 430.20
  4. Step 4: Simplify right side
    695.72x = 412,946.83
  5. Step 5: Solve for x
    x = 412,946.83/695.72
  6. Step 6: Final answer
    x = 593.55

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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.