Home / 420,920.87-580,849.11-229,897.35

Finding the Fourth Proportional to 420,920.87, 580,849.11 and 229,897.35

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Solution

The fourth proportional to 420,920.87, 580,849.11 and 229,897.35 is: 317,246.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,920.87 : 580,849.11 = 229,897.35 : x
  2. Step 2: Convert to fraction form
    420,920.87/580,849.11 = 229,897.35/x
  3. Step 3: Cross multiply
    420,920.87x = 580,849.11 × 229,897.35
  4. Step 4: Simplify right side
    420,920.87x = 133,535,671,138.86
  5. Step 5: Solve for x
    x = 133,535,671,138.86/420,920.87
  6. Step 6: Final answer
    x = 317,246.50

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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.