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Finding the Fourth Proportional to 621.10, 923.49 and 604.90

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Solution

The fourth proportional to 621.10, 923.49 and 604.90 is: 899.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.10 : 923.49 = 604.90 : x
  2. Step 2: Convert to fraction form
    621.10/923.49 = 604.90/x
  3. Step 3: Cross multiply
    621.10x = 923.49 × 604.90
  4. Step 4: Simplify right side
    621.10x = 558,619.10
  5. Step 5: Solve for x
    x = 558,619.10/621.10
  6. Step 6: Final answer
    x = 899.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.