Home / 1,621.18-2,431.35-697.30

Finding the Fourth Proportional to 1,621.18, 2,431.35 and 697.30

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Solution

The fourth proportional to 1,621.18, 2,431.35 and 697.30 is: 1,045.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.18 : 2,431.35 = 697.30 : x
  2. Step 2: Convert to fraction form
    1,621.18/2,431.35 = 697.30/x
  3. Step 3: Cross multiply
    1,621.18x = 2,431.35 × 697.30
  4. Step 4: Simplify right side
    1,621.18x = 1,695,380.36
  5. Step 5: Solve for x
    x = 1,695,380.36/1,621.18
  6. Step 6: Final answer
    x = 1,045.77

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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.