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Finding the Fourth Proportional to 491.07, 736.23 and 317.91

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Solution

The fourth proportional to 491.07, 736.23 and 317.91 is: 476.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.07 : 736.23 = 317.91 : x
  2. Step 2: Convert to fraction form
    491.07/736.23 = 317.91/x
  3. Step 3: Cross multiply
    491.07x = 736.23 × 317.91
  4. Step 4: Simplify right side
    491.07x = 234,054.88
  5. Step 5: Solve for x
    x = 234,054.88/491.07
  6. Step 6: Final answer
    x = 476.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.