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Finding the Fourth Proportional to 903.31, 1,356.50 and 558.68

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Solution

The fourth proportional to 903.31, 1,356.50 and 558.68 is: 838.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.31 : 1,356.50 = 558.68 : x
  2. Step 2: Convert to fraction form
    903.31/1,356.50 = 558.68/x
  3. Step 3: Cross multiply
    903.31x = 1,356.50 × 558.68
  4. Step 4: Simplify right side
    903.31x = 757,846.58
  5. Step 5: Solve for x
    x = 757,846.58/903.31
  6. Step 6: Final answer
    x = 838.97

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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.