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Finding the Fourth Proportional to 491.07, 677.66 and 281.26

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Solution

The fourth proportional to 491.07, 677.66 and 281.26 is: 388.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.07 : 677.66 = 281.26 : x
  2. Step 2: Convert to fraction form
    491.07/677.66 = 281.26/x
  3. Step 3: Cross multiply
    491.07x = 677.66 × 281.26
  4. Step 4: Simplify right side
    491.07x = 190,598.65
  5. Step 5: Solve for x
    x = 190,598.65/491.07
  6. Step 6: Final answer
    x = 388.13

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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.