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Finding the Fourth Proportional to 1,501.44, 2,071.92 and 838.36

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Solution

The fourth proportional to 1,501.44, 2,071.92 and 838.36 is: 1,156.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,501.44 : 2,071.92 = 838.36 : x
  2. Step 2: Convert to fraction form
    1,501.44/2,071.92 = 838.36/x
  3. Step 3: Cross multiply
    1,501.44x = 2,071.92 × 838.36
  4. Step 4: Simplify right side
    1,501.44x = 1,737,014.85
  5. Step 5: Solve for x
    x = 1,737,014.85/1,501.44
  6. Step 6: Final answer
    x = 1,156.90

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1.5x scale

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.