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Finding the Fourth Proportional to 676.35, 1,011.73 and 618.14

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Solution

The fourth proportional to 676.35, 1,011.73 and 618.14 is: 924.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.35 : 1,011.73 = 618.14 : x
  2. Step 2: Convert to fraction form
    676.35/1,011.73 = 618.14/x
  3. Step 3: Cross multiply
    676.35x = 1,011.73 × 618.14
  4. Step 4: Simplify right side
    676.35x = 625,390.78
  5. Step 5: Solve for x
    x = 625,390.78/676.35
  6. Step 6: Final answer
    x = 924.66

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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.