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Finding the Fourth Proportional to 403,516.40, 605,015.40 and 166,953.20

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Solution

The fourth proportional to 403,516.40, 605,015.40 and 166,953.20 is: 250,322.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,516.40 : 605,015.40 = 166,953.20 : x
  2. Step 2: Convert to fraction form
    403,516.40/605,015.40 = 166,953.20/x
  3. Step 3: Cross multiply
    403,516.40x = 605,015.40 × 166,953.20
  4. Step 4: Simplify right side
    403,516.40x = 101,009,257,079.28
  5. Step 5: Solve for x
    x = 101,009,257,079.28/403,516.40
  6. Step 6: Final answer
    x = 250,322.56

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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.