Home / 1,563.28-2,156.11-1,003.80

Finding the Fourth Proportional to 1,563.28, 2,156.11 and 1,003.80

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Solution

The fourth proportional to 1,563.28, 2,156.11 and 1,003.80 is: 1,384.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.28 : 2,156.11 = 1,003.80 : x
  2. Step 2: Convert to fraction form
    1,563.28/2,156.11 = 1,003.80/x
  3. Step 3: Cross multiply
    1,563.28x = 2,156.11 × 1,003.80
  4. Step 4: Simplify right side
    1,563.28x = 2,164,300.71
  5. Step 5: Solve for x
    x = 2,164,300.71/1,563.28
  6. Step 6: Final answer
    x = 1,384.46

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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.