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Finding the Fourth Proportional to 688.65, 950.07 and 423

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Solution

The fourth proportional to 688.65, 950.07 and 423 is: 583.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.65 : 950.07 = 423 : x
  2. Step 2: Convert to fraction form
    688.65/950.07 = 423/x
  3. Step 3: Cross multiply
    688.65x = 950.07 × 423
  4. Step 4: Simplify right side
    688.65x = 401,879.61
  5. Step 5: Solve for x
    x = 401,879.61/688.65
  6. Step 6: Final answer
    x = 583.58

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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.