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Finding the Fourth Proportional to 848.67, 1,272.57 and 386.23

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Solution

The fourth proportional to 848.67, 1,272.57 and 386.23 is: 579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.67 : 1,272.57 = 386.23 : x
  2. Step 2: Convert to fraction form
    848.67/1,272.57 = 386.23/x
  3. Step 3: Cross multiply
    848.67x = 1,272.57 × 386.23
  4. Step 4: Simplify right side
    848.67x = 491,504.71
  5. Step 5: Solve for x
    x = 491,504.71/848.67
  6. Step 6: Final answer
    x = 579.15

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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.