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Finding the Fourth Proportional to 621.61, 932.61 and 297

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Solution

The fourth proportional to 621.61, 932.61 and 297 is: 445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.61 : 932.61 = 297 : x
  2. Step 2: Convert to fraction form
    621.61/932.61 = 297/x
  3. Step 3: Cross multiply
    621.61x = 932.61 × 297
  4. Step 4: Simplify right side
    621.61x = 276,986.28
  5. Step 5: Solve for x
    x = 276,986.28/621.61
  6. Step 6: Final answer
    x = 445.60

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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.