Home / 684,921.40-1,025,999.70-389,087.80

Finding the Fourth Proportional to 684,921.40, 1,025,999.70 and 389,087.80

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Solution

The fourth proportional to 684,921.40, 1,025,999.70 and 389,087.80 is: 582,846.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,921.40 : 1,025,999.70 = 389,087.80 : x
  2. Step 2: Convert to fraction form
    684,921.40/1,025,999.70 = 389,087.80/x
  3. Step 3: Cross multiply
    684,921.40x = 1,025,999.70 × 389,087.80
  4. Step 4: Simplify right side
    684,921.40x = 399,203,966,073.66
  5. Step 5: Solve for x
    x = 399,203,966,073.66/684,921.40
  6. Step 6: Final answer
    x = 582,846.39

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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.