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Finding the Fourth Proportional to 660.21, 911.23 and 436.18

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Solution

The fourth proportional to 660.21, 911.23 and 436.18 is: 602.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.21 : 911.23 = 436.18 : x
  2. Step 2: Convert to fraction form
    660.21/911.23 = 436.18/x
  3. Step 3: Cross multiply
    660.21x = 911.23 × 436.18
  4. Step 4: Simplify right side
    660.21x = 397,462.38
  5. Step 5: Solve for x
    x = 397,462.38/660.21
  6. Step 6: Final answer
    x = 602.03

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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.