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Finding the Fourth Proportional to 844.10, 1,264.80 and 555.20

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Solution

The fourth proportional to 844.10, 1,264.80 and 555.20 is: 831.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.10 : 1,264.80 = 555.20 : x
  2. Step 2: Convert to fraction form
    844.10/1,264.80 = 555.20/x
  3. Step 3: Cross multiply
    844.10x = 1,264.80 × 555.20
  4. Step 4: Simplify right side
    844.10x = 702,216.96
  5. Step 5: Solve for x
    x = 702,216.96/844.10
  6. Step 6: Final answer
    x = 831.91

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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.