Home / 1,409.15-2,111.70-628.52

Finding the Fourth Proportional to 1,409.15, 2,111.70 and 628.52

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Solution

The fourth proportional to 1,409.15, 2,111.70 and 628.52 is: 941.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.15 : 2,111.70 = 628.52 : x
  2. Step 2: Convert to fraction form
    1,409.15/2,111.70 = 628.52/x
  3. Step 3: Cross multiply
    1,409.15x = 2,111.70 × 628.52
  4. Step 4: Simplify right side
    1,409.15x = 1,327,235.13
  5. Step 5: Solve for x
    x = 1,327,235.13/1,409.15
  6. Step 6: Final answer
    x = 941.87

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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.