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Finding the Fourth Proportional to 845.43, 1,258.65 and 841.38

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Solution

The fourth proportional to 845.43, 1,258.65 and 841.38 is: 1,252.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.43 : 1,258.65 = 841.38 : x
  2. Step 2: Convert to fraction form
    845.43/1,258.65 = 841.38/x
  3. Step 3: Cross multiply
    845.43x = 1,258.65 × 841.38
  4. Step 4: Simplify right side
    845.43x = 1,059,002.94
  5. Step 5: Solve for x
    x = 1,059,002.94/845.43
  6. Step 6: Final answer
    x = 1,252.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.