Home / 1,621.76-2,238.24-1,000.64

Finding the Fourth Proportional to 1,621.76, 2,238.24 and 1,000.64

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Solution

The fourth proportional to 1,621.76, 2,238.24 and 1,000.64 is: 1,381.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.76 : 2,238.24 = 1,000.64 : x
  2. Step 2: Convert to fraction form
    1,621.76/2,238.24 = 1,000.64/x
  3. Step 3: Cross multiply
    1,621.76x = 2,238.24 × 1,000.64
  4. Step 4: Simplify right side
    1,621.76x = 2,239,672.47
  5. Step 5: Solve for x
    x = 2,239,672.47/1,621.76
  6. Step 6: Final answer
    x = 1,381.01

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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.