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Finding the Fourth Proportional to 922.90, 1,385.19 and 375.46

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Solution

The fourth proportional to 922.90, 1,385.19 and 375.46 is: 563.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.90 : 1,385.19 = 375.46 : x
  2. Step 2: Convert to fraction form
    922.90/1,385.19 = 375.46/x
  3. Step 3: Cross multiply
    922.90x = 1,385.19 × 375.46
  4. Step 4: Simplify right side
    922.90x = 520,083.44
  5. Step 5: Solve for x
    x = 520,083.44/922.90
  6. Step 6: Final answer
    x = 563.53

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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.