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Finding the Fourth Proportional to 555.36, 833.31 and 426.18

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Solution

The fourth proportional to 555.36, 833.31 and 426.18 is: 639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.36 : 833.31 = 426.18 : x
  2. Step 2: Convert to fraction form
    555.36/833.31 = 426.18/x
  3. Step 3: Cross multiply
    555.36x = 833.31 × 426.18
  4. Step 4: Simplify right side
    555.36x = 355,140.06
  5. Step 5: Solve for x
    x = 355,140.06/555.36
  6. Step 6: Final answer
    x = 639.48

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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.