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Finding the Fourth Proportional to 491.00, 677.24 and 339.65

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Solution

The fourth proportional to 491.00, 677.24 and 339.65 is: 468.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.00 : 677.24 = 339.65 : x
  2. Step 2: Convert to fraction form
    491.00/677.24 = 339.65/x
  3. Step 3: Cross multiply
    491.00x = 677.24 × 339.65
  4. Step 4: Simplify right side
    491.00x = 230,019.48
  5. Step 5: Solve for x
    x = 230,019.48/491.00
  6. Step 6: Final answer
    x = 468.47

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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.