Home / 1,200.11-1,799.07-430.43

Finding the Fourth Proportional to 1,200.11, 1,799.07 and 430.43

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Solution

The fourth proportional to 1,200.11, 1,799.07 and 430.43 is: 645.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.11 : 1,799.07 = 430.43 : x
  2. Step 2: Convert to fraction form
    1,200.11/1,799.07 = 430.43/x
  3. Step 3: Cross multiply
    1,200.11x = 1,799.07 × 430.43
  4. Step 4: Simplify right side
    1,200.11x = 774,373.70
  5. Step 5: Solve for x
    x = 774,373.70/1,200.11
  6. Step 6: Final answer
    x = 645.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.