Home / 1,179.60-1,628.40-738.15

Finding the Fourth Proportional to 1,179.60, 1,628.40 and 738.15

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Solution

The fourth proportional to 1,179.60, 1,628.40 and 738.15 is: 1,018.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.60 : 1,628.40 = 738.15 : x
  2. Step 2: Convert to fraction form
    1,179.60/1,628.40 = 738.15/x
  3. Step 3: Cross multiply
    1,179.60x = 1,628.40 × 738.15
  4. Step 4: Simplify right side
    1,179.60x = 1,202,003.46
  5. Step 5: Solve for x
    x = 1,202,003.46/1,179.60
  6. Step 6: Final answer
    x = 1,018.99

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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.