Home / 805,845.40-1,208,768.10-485,128.60

Finding the Fourth Proportional to 805,845.40, 1,208,768.10 and 485,128.60

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Solution

The fourth proportional to 805,845.40, 1,208,768.10 and 485,128.60 is: 727,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,845.40 : 1,208,768.10 = 485,128.60 : x
  2. Step 2: Convert to fraction form
    805,845.40/1,208,768.10 = 485,128.60/x
  3. Step 3: Cross multiply
    805,845.40x = 1,208,768.10 × 485,128.60
  4. Step 4: Simplify right side
    805,845.40x = 586,407,976,077.66
  5. Step 5: Solve for x
    x = 586,407,976,077.66/805,845.40
  6. Step 6: Final answer
    x = 727,692.90

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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.