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Finding the Fourth Proportional to 845.40, 1,166.61 and 472.38

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Solution

The fourth proportional to 845.40, 1,166.61 and 472.38 is: 651.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.40 : 1,166.61 = 472.38 : x
  2. Step 2: Convert to fraction form
    845.40/1,166.61 = 472.38/x
  3. Step 3: Cross multiply
    845.40x = 1,166.61 × 472.38
  4. Step 4: Simplify right side
    845.40x = 551,083.23
  5. Step 5: Solve for x
    x = 551,083.23/845.40
  6. Step 6: Final answer
    x = 651.86

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Double scale
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1.5x scale

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.