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Finding the Fourth Proportional to 923.88, 1,275.17 and 609.20

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Solution

The fourth proportional to 923.88, 1,275.17 and 609.20 is: 840.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.88 : 1,275.17 = 609.20 : x
  2. Step 2: Convert to fraction form
    923.88/1,275.17 = 609.20/x
  3. Step 3: Cross multiply
    923.88x = 1,275.17 × 609.20
  4. Step 4: Simplify right side
    923.88x = 776,839.47
  5. Step 5: Solve for x
    x = 776,839.47/923.88
  6. Step 6: Final answer
    x = 840.84

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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.