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Finding the Fourth Proportional to 661.04, 911.96 and 440.07

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Solution

The fourth proportional to 661.04, 911.96 and 440.07 is: 607.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.04 : 911.96 = 440.07 : x
  2. Step 2: Convert to fraction form
    661.04/911.96 = 440.07/x
  3. Step 3: Cross multiply
    661.04x = 911.96 × 440.07
  4. Step 4: Simplify right side
    661.04x = 401,322.27
  5. Step 5: Solve for x
    x = 401,322.27/661.04
  6. Step 6: Final answer
    x = 607.10

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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.