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Finding the Fourth Proportional to 801.36, 1,106.60 and 661.26

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Solution

The fourth proportional to 801.36, 1,106.60 and 661.26 is: 913.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.36 : 1,106.60 = 661.26 : x
  2. Step 2: Convert to fraction form
    801.36/1,106.60 = 661.26/x
  3. Step 3: Cross multiply
    801.36x = 1,106.60 × 661.26
  4. Step 4: Simplify right side
    801.36x = 731,751.16
  5. Step 5: Solve for x
    x = 731,751.16/801.36
  6. Step 6: Final answer
    x = 913.14

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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.