Home / 420,748.80-631,123.20-263,284.80

Finding the Fourth Proportional to 420,748.80, 631,123.20 and 263,284.80

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Solution

The fourth proportional to 420,748.80, 631,123.20 and 263,284.80 is: 394,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,748.80 : 631,123.20 = 263,284.80 : x
  2. Step 2: Convert to fraction form
    420,748.80/631,123.20 = 263,284.80/x
  3. Step 3: Cross multiply
    420,748.80x = 631,123.20 × 263,284.80
  4. Step 4: Simplify right side
    420,748.80x = 166,165,145,487.36
  5. Step 5: Solve for x
    x = 166,165,145,487.36/420,748.80
  6. Step 6: Final answer
    x = 394,927.20

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1.5x scale

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.