Home / 685,879.40-1,029,402.30-307,382.60

Finding the Fourth Proportional to 685,879.40, 1,029,402.30 and 307,382.60

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Solution

The fourth proportional to 685,879.40, 1,029,402.30 and 307,382.60 is: 461,335.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,879.40 : 1,029,402.30 = 307,382.60 : x
  2. Step 2: Convert to fraction form
    685,879.40/1,029,402.30 = 307,382.60/x
  3. Step 3: Cross multiply
    685,879.40x = 1,029,402.30 × 307,382.60
  4. Step 4: Simplify right side
    685,879.40x = 316,420,355,419.98
  5. Step 5: Solve for x
    x = 316,420,355,419.98/685,879.40
  6. Step 6: Final answer
    x = 461,335.27

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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.