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Finding the Fourth Proportional to 848.44, 1,272.80 and 415.63

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Solution

The fourth proportional to 848.44, 1,272.80 and 415.63 is: 623.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.44 : 1,272.80 = 415.63 : x
  2. Step 2: Convert to fraction form
    848.44/1,272.80 = 415.63/x
  3. Step 3: Cross multiply
    848.44x = 1,272.80 × 415.63
  4. Step 4: Simplify right side
    848.44x = 529,013.86
  5. Step 5: Solve for x
    x = 529,013.86/848.44
  6. Step 6: Final answer
    x = 623.51

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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.