Home / 720,563.31-1,079,349.57-420,132.69

Finding the Fourth Proportional to 720,563.31, 1,079,349.57 and 420,132.69

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Solution

The fourth proportional to 720,563.31, 1,079,349.57 and 420,132.69 is: 629,327.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,563.31 : 1,079,349.57 = 420,132.69 : x
  2. Step 2: Convert to fraction form
    720,563.31/1,079,349.57 = 420,132.69/x
  3. Step 3: Cross multiply
    720,563.31x = 1,079,349.57 × 420,132.69
  4. Step 4: Simplify right side
    720,563.31x = 453,470,038,294.44
  5. Step 5: Solve for x
    x = 453,470,038,294.44/720,563.31
  6. Step 6: Final answer
    x = 629,327.13

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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.