Home / 420,011.40-629,944.20-153,634.80

Finding the Fourth Proportional to 420,011.40, 629,944.20 and 153,634.80

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Solution

The fourth proportional to 420,011.40, 629,944.20 and 153,634.80 is: 230,425.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,011.40 : 629,944.20 = 153,634.80 : x
  2. Step 2: Convert to fraction form
    420,011.40/629,944.20 = 153,634.80/x
  3. Step 3: Cross multiply
    420,011.40x = 629,944.20 × 153,634.80
  4. Step 4: Simplify right side
    420,011.40x = 96,781,351,178.16
  5. Step 5: Solve for x
    x = 96,781,351,178.16/420,011.40
  6. Step 6: Final answer
    x = 230,425.53

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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.