Home / 420,890.48-631,429.01-121,347.69

Finding the Fourth Proportional to 420,890.48, 631,429.01 and 121,347.69

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Solution

The fourth proportional to 420,890.48, 631,429.01 and 121,347.69 is: 182,048.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,890.48 : 631,429.01 = 121,347.69 : x
  2. Step 2: Convert to fraction form
    420,890.48/631,429.01 = 121,347.69/x
  3. Step 3: Cross multiply
    420,890.48x = 631,429.01 × 121,347.69
  4. Step 4: Simplify right side
    420,890.48x = 76,622,451,155.75
  5. Step 5: Solve for x
    x = 76,622,451,155.75/420,890.48
  6. Step 6: Final answer
    x = 182,048.43

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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.