Home / 420,028.50-629,929.70-153,790.40

Finding the Fourth Proportional to 420,028.50, 629,929.70 and 153,790.40

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Solution

The fourth proportional to 420,028.50, 629,929.70 and 153,790.40 is: 230,644.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,028.50 : 629,929.70 = 153,790.40 : x
  2. Step 2: Convert to fraction form
    420,028.50/629,929.70 = 153,790.40/x
  3. Step 3: Cross multiply
    420,028.50x = 629,929.70 × 153,790.40
  4. Step 4: Simplify right side
    420,028.50x = 96,877,140,534.88
  5. Step 5: Solve for x
    x = 96,877,140,534.88/420,028.50
  6. Step 6: Final answer
    x = 230,644.21

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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.