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Finding the Fourth Proportional to 997.68, 1,488 and 945.84

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Solution

The fourth proportional to 997.68, 1,488 and 945.84 is: 1,410.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.68 : 1,488 = 945.84 : x
  2. Step 2: Convert to fraction form
    997.68/1,488 = 945.84/x
  3. Step 3: Cross multiply
    997.68x = 1,488 × 945.84
  4. Step 4: Simplify right side
    997.68x = 1,407,409.92
  5. Step 5: Solve for x
    x = 1,407,409.92/997.68
  6. Step 6: Final answer
    x = 1,410.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.