Home / 1,293,399.36-1,784,945.28-720,438.72

Finding the Fourth Proportional to 1,293,399.36, 1,784,945.28 and 720,438.72

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Solution

The fourth proportional to 1,293,399.36, 1,784,945.28 and 720,438.72 is: 994,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,399.36 : 1,784,945.28 = 720,438.72 : x
  2. Step 2: Convert to fraction form
    1,293,399.36/1,784,945.28 = 720,438.72/x
  3. Step 3: Cross multiply
    1,293,399.36x = 1,784,945.28 × 720,438.72
  4. Step 4: Simplify right side
    1,293,399.36x = 1,285,943,692,793.24
  5. Step 5: Solve for x
    x = 1,285,943,692,793.24/1,293,399.36
  6. Step 6: Final answer
    x = 994,235.60

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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.