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Finding the Fourth Proportional to 848.51, 1,272.98 and 386.07

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Solution

The fourth proportional to 848.51, 1,272.98 and 386.07 is: 579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.51 : 1,272.98 = 386.07 : x
  2. Step 2: Convert to fraction form
    848.51/1,272.98 = 386.07/x
  3. Step 3: Cross multiply
    848.51x = 1,272.98 × 386.07
  4. Step 4: Simplify right side
    848.51x = 491,455.58
  5. Step 5: Solve for x
    x = 491,455.58/848.51
  6. Step 6: Final answer
    x = 579.20

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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.