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Finding the Fourth Proportional to 1,203,405.15, 1,659,742.38 and 1,022,715.21

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Solution

The fourth proportional to 1,203,405.15, 1,659,742.38 and 1,022,715.21 is: 1,410,533.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203,405.15 : 1,659,742.38 = 1,022,715.21 : x
  2. Step 2: Convert to fraction form
    1,203,405.15/1,659,742.38 = 1,022,715.21/x
  3. Step 3: Cross multiply
    1,203,405.15x = 1,659,742.38 × 1,022,715.21
  4. Step 4: Simplify right side
    1,203,405.15x = 1,697,443,776,707.60
  5. Step 5: Solve for x
    x = 1,697,443,776,707.60/1,203,405.15
  6. Step 6: Final answer
    x = 1,410,533.91

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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.