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Finding the Fourth Proportional to 501.72, 691.46 and 403.32

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Solution

The fourth proportional to 501.72, 691.46 and 403.32 is: 555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.72 : 691.46 = 403.32 : x
  2. Step 2: Convert to fraction form
    501.72/691.46 = 403.32/x
  3. Step 3: Cross multiply
    501.72x = 691.46 × 403.32
  4. Step 4: Simplify right side
    501.72x = 278,879.65
  5. Step 5: Solve for x
    x = 278,879.65/501.72
  6. Step 6: Final answer
    x = 555.85

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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.