Home / 803,999.20-1,205,998.80-426,085.60

Finding the Fourth Proportional to 803,999.20, 1,205,998.80 and 426,085.60

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Solution

The fourth proportional to 803,999.20, 1,205,998.80 and 426,085.60 is: 639,128.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,999.20 : 1,205,998.80 = 426,085.60 : x
  2. Step 2: Convert to fraction form
    803,999.20/1,205,998.80 = 426,085.60/x
  3. Step 3: Cross multiply
    803,999.20x = 1,205,998.80 × 426,085.60
  4. Step 4: Simplify right side
    803,999.20x = 513,858,722,297.28
  5. Step 5: Solve for x
    x = 513,858,722,297.28/803,999.20
  6. Step 6: Final answer
    x = 639,128.40

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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.