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Finding the Fourth Proportional to 968.62, 1,335.99 and 614.65

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Solution

The fourth proportional to 968.62, 1,335.99 and 614.65 is: 847.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.62 : 1,335.99 = 614.65 : x
  2. Step 2: Convert to fraction form
    968.62/1,335.99 = 614.65/x
  3. Step 3: Cross multiply
    968.62x = 1,335.99 × 614.65
  4. Step 4: Simplify right side
    968.62x = 821,166.25
  5. Step 5: Solve for x
    x = 821,166.25/968.62
  6. Step 6: Final answer
    x = 847.77

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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.