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Finding the Fourth Proportional to 660.98, 912.51 and 440.25

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Solution

The fourth proportional to 660.98, 912.51 and 440.25 is: 607.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.98 : 912.51 = 440.25 : x
  2. Step 2: Convert to fraction form
    660.98/912.51 = 440.25/x
  3. Step 3: Cross multiply
    660.98x = 912.51 × 440.25
  4. Step 4: Simplify right side
    660.98x = 401,732.53
  5. Step 5: Solve for x
    x = 401,732.53/660.98
  6. Step 6: Final answer
    x = 607.79

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1.5x scale

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.