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Finding the Fourth Proportional to 491.13, 735.12 and 259.69

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Solution

The fourth proportional to 491.13, 735.12 and 259.69 is: 388.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.13 : 735.12 = 259.69 : x
  2. Step 2: Convert to fraction form
    491.13/735.12 = 259.69/x
  3. Step 3: Cross multiply
    491.13x = 735.12 × 259.69
  4. Step 4: Simplify right side
    491.13x = 190,903.31
  5. Step 5: Solve for x
    x = 190,903.31/491.13
  6. Step 6: Final answer
    x = 388.70

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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.