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Finding the Fourth Proportional to 491.59, 736.23 and 388.18

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Solution

The fourth proportional to 491.59, 736.23 and 388.18 is: 581.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.59 : 736.23 = 388.18 : x
  2. Step 2: Convert to fraction form
    491.59/736.23 = 388.18/x
  3. Step 3: Cross multiply
    491.59x = 736.23 × 388.18
  4. Step 4: Simplify right side
    491.59x = 285,792.14
  5. Step 5: Solve for x
    x = 285,792.14/491.59
  6. Step 6: Final answer
    x = 581.36

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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.