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Finding the Fourth Proportional to 501.00, 691.42 and 279.99

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Solution

The fourth proportional to 501.00, 691.42 and 279.99 is: 386.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.00 : 691.42 = 279.99 : x
  2. Step 2: Convert to fraction form
    501.00/691.42 = 279.99/x
  3. Step 3: Cross multiply
    501.00x = 691.42 × 279.99
  4. Step 4: Simplify right side
    501.00x = 193,590.51
  5. Step 5: Solve for x
    x = 193,590.51/501.00
  6. Step 6: Final answer
    x = 386.41

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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.