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Finding the Fourth Proportional to 924.34, 1,386.78 and 617.44

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Solution

The fourth proportional to 924.34, 1,386.78 and 617.44 is: 926.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.34 : 1,386.78 = 617.44 : x
  2. Step 2: Convert to fraction form
    924.34/1,386.78 = 617.44/x
  3. Step 3: Cross multiply
    924.34x = 1,386.78 × 617.44
  4. Step 4: Simplify right side
    924.34x = 856,253.44
  5. Step 5: Solve for x
    x = 856,253.44/924.34
  6. Step 6: Final answer
    x = 926.34

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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.