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Finding the Fourth Proportional to 613.93, 921.81 and 603

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Solution

The fourth proportional to 613.93, 921.81 and 603 is: 905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.93 : 921.81 = 603 : x
  2. Step 2: Convert to fraction form
    613.93/921.81 = 603/x
  3. Step 3: Cross multiply
    613.93x = 921.81 × 603
  4. Step 4: Simplify right side
    613.93x = 555,851.43
  5. Step 5: Solve for x
    x = 555,851.43/613.93
  6. Step 6: Final answer
    x = 905.40

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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.