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Finding the Fourth Proportional to 1,170.80, 1,615.60 and 673.40

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Solution

The fourth proportional to 1,170.80, 1,615.60 and 673.40 is: 929.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.80 : 1,615.60 = 673.40 : x
  2. Step 2: Convert to fraction form
    1,170.80/1,615.60 = 673.40/x
  3. Step 3: Cross multiply
    1,170.80x = 1,615.60 × 673.40
  4. Step 4: Simplify right side
    1,170.80x = 1,087,945.04
  5. Step 5: Solve for x
    x = 1,087,945.04/1,170.80
  6. Step 6: Final answer
    x = 929.23

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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.