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Finding the Fourth Proportional to 420,903.60, 580,860.92 and 229,934.80

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Solution

The fourth proportional to 420,903.60, 580,860.92 and 229,934.80 is: 317,317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,903.60 : 580,860.92 = 229,934.80 : x
  2. Step 2: Convert to fraction form
    420,903.60/580,860.92 = 229,934.80/x
  3. Step 3: Cross multiply
    420,903.60x = 580,860.92 × 229,934.80
  4. Step 4: Simplify right side
    420,903.60x = 133,560,139,468.02
  5. Step 5: Solve for x
    x = 133,560,139,468.02/420,903.60
  6. Step 6: Final answer
    x = 317,317.65

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1.5x scale

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.