Home / 1,119.10-1,545.06-720.96

Finding the Fourth Proportional to 1,119.10, 1,545.06 and 720.96

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Solution

The fourth proportional to 1,119.10, 1,545.06 and 720.96 is: 995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.10 : 1,545.06 = 720.96 : x
  2. Step 2: Convert to fraction form
    1,119.10/1,545.06 = 720.96/x
  3. Step 3: Cross multiply
    1,119.10x = 1,545.06 × 720.96
  4. Step 4: Simplify right side
    1,119.10x = 1,113,933.22
  5. Step 5: Solve for x
    x = 1,113,933.22/1,119.10
  6. Step 6: Final answer
    x = 995.38

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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.