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Finding the Fourth Proportional to 491.10, 736.68 and 285.51

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Solution

The fourth proportional to 491.10, 736.68 and 285.51 is: 428.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.10 : 736.68 = 285.51 : x
  2. Step 2: Convert to fraction form
    491.10/736.68 = 285.51/x
  3. Step 3: Cross multiply
    491.10x = 736.68 × 285.51
  4. Step 4: Simplify right side
    491.10x = 210,329.51
  5. Step 5: Solve for x
    x = 210,329.51/491.10
  6. Step 6: Final answer
    x = 428.28

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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.