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Finding the Fourth Proportional to 903.43, 1,355.67 and 383.39

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Solution

The fourth proportional to 903.43, 1,355.67 and 383.39 is: 575.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.43 : 1,355.67 = 383.39 : x
  2. Step 2: Convert to fraction form
    903.43/1,355.67 = 383.39/x
  3. Step 3: Cross multiply
    903.43x = 1,355.67 × 383.39
  4. Step 4: Simplify right side
    903.43x = 519,753.71
  5. Step 5: Solve for x
    x = 519,753.71/903.43
  6. Step 6: Final answer
    x = 575.31

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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.