Home / 1,563.09-2,157.53-1,003.89

Finding the Fourth Proportional to 1,563.09, 2,157.53 and 1,003.89

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Solution

The fourth proportional to 1,563.09, 2,157.53 and 1,003.89 is: 1,385.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.09 : 2,157.53 = 1,003.89 : x
  2. Step 2: Convert to fraction form
    1,563.09/2,157.53 = 1,003.89/x
  3. Step 3: Cross multiply
    1,563.09x = 2,157.53 × 1,003.89
  4. Step 4: Simplify right side
    1,563.09x = 2,165,917.77
  5. Step 5: Solve for x
    x = 2,165,917.77/1,563.09
  6. Step 6: Final answer
    x = 1,385.66

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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.