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Finding the Fourth Proportional to 40,398.40, 55,718.44 and 35,865.87

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Solution

The fourth proportional to 40,398.40, 55,718.44 and 35,865.87 is: 49,467.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,398.40 : 55,718.44 = 35,865.87 : x
  2. Step 2: Convert to fraction form
    40,398.40/55,718.44 = 35,865.87/x
  3. Step 3: Cross multiply
    40,398.40x = 55,718.44 × 35,865.87
  4. Step 4: Simplify right side
    40,398.40x = 1,998,390,325.64
  5. Step 5: Solve for x
    x = 1,998,390,325.64/40,398.40
  6. Step 6: Final answer
    x = 49,467.07

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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.