Home / 1,551.31-2,139.99-1,177.67

Finding the Fourth Proportional to 1,551.31, 2,139.99 and 1,177.67

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Solution

The fourth proportional to 1,551.31, 2,139.99 and 1,177.67 is: 1,624.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.31 : 2,139.99 = 1,177.67 : x
  2. Step 2: Convert to fraction form
    1,551.31/2,139.99 = 1,177.67/x
  3. Step 3: Cross multiply
    1,551.31x = 2,139.99 × 1,177.67
  4. Step 4: Simplify right side
    1,551.31x = 2,520,202.02
  5. Step 5: Solve for x
    x = 2,520,202.02/1,551.31
  6. Step 6: Final answer
    x = 1,624.56

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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.