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Finding the Fourth Proportional to 845.48, 1,265.82 and 553.32

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Solution

The fourth proportional to 845.48, 1,265.82 and 553.32 is: 828.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.48 : 1,265.82 = 553.32 : x
  2. Step 2: Convert to fraction form
    845.48/1,265.82 = 553.32/x
  3. Step 3: Cross multiply
    845.48x = 1,265.82 × 553.32
  4. Step 4: Simplify right side
    845.48x = 700,403.52
  5. Step 5: Solve for x
    x = 700,403.52/845.48
  6. Step 6: Final answer
    x = 828.41

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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.