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Finding the Fourth Proportional to 934.02, 1,290.60 and 673.20

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Solution

The fourth proportional to 934.02, 1,290.60 and 673.20 is: 930.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.02 : 1,290.60 = 673.20 : x
  2. Step 2: Convert to fraction form
    934.02/1,290.60 = 673.20/x
  3. Step 3: Cross multiply
    934.02x = 1,290.60 × 673.20
  4. Step 4: Simplify right side
    934.02x = 868,831.92
  5. Step 5: Solve for x
    x = 868,831.92/934.02
  6. Step 6: Final answer
    x = 930.21

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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.