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Finding the Fourth Proportional to 1,503.02, 2,074.08 and 839.74

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Solution

The fourth proportional to 1,503.02, 2,074.08 and 839.74 is: 1,158.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.02 : 2,074.08 = 839.74 : x
  2. Step 2: Convert to fraction form
    1,503.02/2,074.08 = 839.74/x
  3. Step 3: Cross multiply
    1,503.02x = 2,074.08 × 839.74
  4. Step 4: Simplify right side
    1,503.02x = 1,741,682.75
  5. Step 5: Solve for x
    x = 1,741,682.75/1,503.02
  6. Step 6: Final answer
    x = 1,158.79

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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.