Home / 1,143.08-1,577.31-723.67

Finding the Fourth Proportional to 1,143.08, 1,577.31 and 723.67

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Solution

The fourth proportional to 1,143.08, 1,577.31 and 723.67 is: 998.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.08 : 1,577.31 = 723.67 : x
  2. Step 2: Convert to fraction form
    1,143.08/1,577.31 = 723.67/x
  3. Step 3: Cross multiply
    1,143.08x = 1,577.31 × 723.67
  4. Step 4: Simplify right side
    1,143.08x = 1,141,445.27
  5. Step 5: Solve for x
    x = 1,141,445.27/1,143.08
  6. Step 6: Final answer
    x = 998.57

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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.