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Finding the Fourth Proportional to 1,502.11, 2,072.85 and 838.95

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Solution

The fourth proportional to 1,502.11, 2,072.85 and 838.95 is: 1,157.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502.11 : 2,072.85 = 838.95 : x
  2. Step 2: Convert to fraction form
    1,502.11/2,072.85 = 838.95/x
  3. Step 3: Cross multiply
    1,502.11x = 2,072.85 × 838.95
  4. Step 4: Simplify right side
    1,502.11x = 1,739,017.51
  5. Step 5: Solve for x
    x = 1,739,017.51/1,502.11
  6. Step 6: Final answer
    x = 1,157.72

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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.