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Finding the Fourth Proportional to 848.45, 1,272.71 and 263.47

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Solution

The fourth proportional to 848.45, 1,272.71 and 263.47 is: 395.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.45 : 1,272.71 = 263.47 : x
  2. Step 2: Convert to fraction form
    848.45/1,272.71 = 263.47/x
  3. Step 3: Cross multiply
    848.45x = 1,272.71 × 263.47
  4. Step 4: Simplify right side
    848.45x = 335,315.40
  5. Step 5: Solve for x
    x = 335,315.40/848.45
  6. Step 6: Final answer
    x = 395.21

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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.