Home / 420,042.40-629,899.80-183,223.60

Finding the Fourth Proportional to 420,042.40, 629,899.80 and 183,223.60

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Solution

The fourth proportional to 420,042.40, 629,899.80 and 183,223.60 is: 274,763.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,042.40 : 629,899.80 = 183,223.60 : x
  2. Step 2: Convert to fraction form
    420,042.40/629,899.80 = 183,223.60/x
  3. Step 3: Cross multiply
    420,042.40x = 629,899.80 × 183,223.60
  4. Step 4: Simplify right side
    420,042.40x = 115,412,508,995.28
  5. Step 5: Solve for x
    x = 115,412,508,995.28/420,042.40
  6. Step 6: Final answer
    x = 274,763.95

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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.