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Finding the Fourth Proportional to 859,093.60, 1,288,640.40 and 660,416.80

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Solution

The fourth proportional to 859,093.60, 1,288,640.40 and 660,416.80 is: 990,625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,093.60 : 1,288,640.40 = 660,416.80 : x
  2. Step 2: Convert to fraction form
    859,093.60/1,288,640.40 = 660,416.80/x
  3. Step 3: Cross multiply
    859,093.60x = 1,288,640.40 × 660,416.80
  4. Step 4: Simplify right side
    859,093.60x = 851,039,769,318.72
  5. Step 5: Solve for x
    x = 851,039,769,318.72/859,093.60
  6. Step 6: Final answer
    x = 990,625.20

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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.