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Finding the Fourth Proportional to 660.40, 909.48 and 601.99

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Solution

The fourth proportional to 660.40, 909.48 and 601.99 is: 829.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.40 : 909.48 = 601.99 : x
  2. Step 2: Convert to fraction form
    660.40/909.48 = 601.99/x
  3. Step 3: Cross multiply
    660.40x = 909.48 × 601.99
  4. Step 4: Simplify right side
    660.40x = 547,497.87
  5. Step 5: Solve for x
    x = 547,497.87/660.40
  6. Step 6: Final answer
    x = 829.04

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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.