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Finding the Fourth Proportional to 612.30, 923.10 and 579.90

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Solution

The fourth proportional to 612.30, 923.10 and 579.90 is: 874.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.30 : 923.10 = 579.90 : x
  2. Step 2: Convert to fraction form
    612.30/923.10 = 579.90/x
  3. Step 3: Cross multiply
    612.30x = 923.10 × 579.90
  4. Step 4: Simplify right side
    612.30x = 535,305.69
  5. Step 5: Solve for x
    x = 535,305.69/612.30
  6. Step 6: Final answer
    x = 874.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.