Home / 1,161.11-1,740.85-430.49

Finding the Fourth Proportional to 1,161.11, 1,740.85 and 430.49

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Solution

The fourth proportional to 1,161.11, 1,740.85 and 430.49 is: 645.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.11 : 1,740.85 = 430.49 : x
  2. Step 2: Convert to fraction form
    1,161.11/1,740.85 = 430.49/x
  3. Step 3: Cross multiply
    1,161.11x = 1,740.85 × 430.49
  4. Step 4: Simplify right side
    1,161.11x = 749,419.92
  5. Step 5: Solve for x
    x = 749,419.92/1,161.11
  6. Step 6: Final answer
    x = 645.43

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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.