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Finding the Fourth Proportional to 936.02, 1,289.70 and 673.58

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Solution

The fourth proportional to 936.02, 1,289.70 and 673.58 is: 928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.02 : 1,289.70 = 673.58 : x
  2. Step 2: Convert to fraction form
    936.02/1,289.70 = 673.58/x
  3. Step 3: Cross multiply
    936.02x = 1,289.70 × 673.58
  4. Step 4: Simplify right side
    936.02x = 868,716.13
  5. Step 5: Solve for x
    x = 868,716.13/936.02
  6. Step 6: Final answer
    x = 928.10

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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.