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Finding the Fourth Proportional to 693.28, 956.64 and 431.38

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Solution

The fourth proportional to 693.28, 956.64 and 431.38 is: 595.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.28 : 956.64 = 431.38 : x
  2. Step 2: Convert to fraction form
    693.28/956.64 = 431.38/x
  3. Step 3: Cross multiply
    693.28x = 956.64 × 431.38
  4. Step 4: Simplify right side
    693.28x = 412,675.36
  5. Step 5: Solve for x
    x = 412,675.36/693.28
  6. Step 6: Final answer
    x = 595.25

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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.