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Finding the Fourth Proportional to 841.06, 1,269.17 and 810.55

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Solution

The fourth proportional to 841.06, 1,269.17 and 810.55 is: 1,223.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.06 : 1,269.17 = 810.55 : x
  2. Step 2: Convert to fraction form
    841.06/1,269.17 = 810.55/x
  3. Step 3: Cross multiply
    841.06x = 1,269.17 × 810.55
  4. Step 4: Simplify right side
    841.06x = 1,028,719.40
  5. Step 5: Solve for x
    x = 1,028,719.40/841.06
  6. Step 6: Final answer
    x = 1,223.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.