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Finding the Fourth Proportional to 845.15, 1,166.84 and 551.25

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Solution

The fourth proportional to 845.15, 1,166.84 and 551.25 is: 761.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.15 : 1,166.84 = 551.25 : x
  2. Step 2: Convert to fraction form
    845.15/1,166.84 = 551.25/x
  3. Step 3: Cross multiply
    845.15x = 1,166.84 × 551.25
  4. Step 4: Simplify right side
    845.15x = 643,217.79
  5. Step 5: Solve for x
    x = 643,217.79/845.15
  6. Step 6: Final answer
    x = 761.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.