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Finding the Fourth Proportional to 848.08, 1,272.31 and 386.00

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Solution

The fourth proportional to 848.08, 1,272.31 and 386.00 is: 579.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.08 : 1,272.31 = 386.00 : x
  2. Step 2: Convert to fraction form
    848.08/1,272.31 = 386.00/x
  3. Step 3: Cross multiply
    848.08x = 1,272.31 × 386.00
  4. Step 4: Simplify right side
    848.08x = 491,103.37
  5. Step 5: Solve for x
    x = 491,103.37/848.08
  6. Step 6: Final answer
    x = 579.08

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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.