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Finding the Fourth Proportional to 923.98, 1,275.30 and 609.30

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Solution

The fourth proportional to 923.98, 1,275.30 and 609.30 is: 840.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.98 : 1,275.30 = 609.30 : x
  2. Step 2: Convert to fraction form
    923.98/1,275.30 = 609.30/x
  3. Step 3: Cross multiply
    923.98x = 1,275.30 × 609.30
  4. Step 4: Simplify right side
    923.98x = 777,037.85
  5. Step 5: Solve for x
    x = 777,037.85/923.98
  6. Step 6: Final answer
    x = 840.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.