Home / 858,806.70-1,288,210.05-438,902.70

Finding the Fourth Proportional to 858,806.70, 1,288,210.05 and 438,902.70

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Solution

The fourth proportional to 858,806.70, 1,288,210.05 and 438,902.70 is: 658,354.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,806.70 : 1,288,210.05 = 438,902.70 : x
  2. Step 2: Convert to fraction form
    858,806.70/1,288,210.05 = 438,902.70/x
  3. Step 3: Cross multiply
    858,806.70x = 1,288,210.05 × 438,902.70
  4. Step 4: Simplify right side
    858,806.70x = 565,398,869,112.14
  5. Step 5: Solve for x
    x = 565,398,869,112.14/858,806.70
  6. Step 6: Final answer
    x = 658,354.05

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Double scale
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Similar ratio
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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.