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Finding the Fourth Proportional to 1,303.11, 1,953 and 938.61

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Solution

The fourth proportional to 1,303.11, 1,953 and 938.61 is: 1,406.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.11 : 1,953 = 938.61 : x
  2. Step 2: Convert to fraction form
    1,303.11/1,953 = 938.61/x
  3. Step 3: Cross multiply
    1,303.11x = 1,953 × 938.61
  4. Step 4: Simplify right side
    1,303.11x = 1,833,105.33
  5. Step 5: Solve for x
    x = 1,833,105.33/1,303.11
  6. Step 6: Final answer
    x = 1,406.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.