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Finding the Fourth Proportional to 921.61, 1,382.43 and 297.02

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Solution

The fourth proportional to 921.61, 1,382.43 and 297.02 is: 445.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.61 : 1,382.43 = 297.02 : x
  2. Step 2: Convert to fraction form
    921.61/1,382.43 = 297.02/x
  3. Step 3: Cross multiply
    921.61x = 1,382.43 × 297.02
  4. Step 4: Simplify right side
    921.61x = 410,612.81
  5. Step 5: Solve for x
    x = 410,612.81/921.61
  6. Step 6: Final answer
    x = 445.54

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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.