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Finding the Fourth Proportional to 903.46, 1,355.43 and 383.48

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Solution

The fourth proportional to 903.46, 1,355.43 and 383.48 is: 575.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.46 : 1,355.43 = 383.48 : x
  2. Step 2: Convert to fraction form
    903.46/1,355.43 = 383.48/x
  3. Step 3: Cross multiply
    903.46x = 1,355.43 × 383.48
  4. Step 4: Simplify right side
    903.46x = 519,778.38
  5. Step 5: Solve for x
    x = 519,778.38/903.46
  6. Step 6: Final answer
    x = 575.32

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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.