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Finding the Fourth Proportional to 848.63, 1,272.87 and 263.61

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Solution

The fourth proportional to 848.63, 1,272.87 and 263.61 is: 395.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.63 : 1,272.87 = 263.61 : x
  2. Step 2: Convert to fraction form
    848.63/1,272.87 = 263.61/x
  3. Step 3: Cross multiply
    848.63x = 1,272.87 × 263.61
  4. Step 4: Simplify right side
    848.63x = 335,541.26
  5. Step 5: Solve for x
    x = 335,541.26/848.63
  6. Step 6: Final answer
    x = 395.39

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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.