Home / 1,280,286.88-1,920,663.60-438,923.68

Finding the Fourth Proportional to 1,280,286.88, 1,920,663.60 and 438,923.68

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Solution

The fourth proportional to 1,280,286.88, 1,920,663.60 and 438,923.68 is: 658,465.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,286.88 : 1,920,663.60 = 438,923.68 : x
  2. Step 2: Convert to fraction form
    1,280,286.88/1,920,663.60 = 438,923.68/x
  3. Step 3: Cross multiply
    1,280,286.88x = 1,920,663.60 × 438,923.68
  4. Step 4: Simplify right side
    1,280,286.88x = 843,024,735,354.05
  5. Step 5: Solve for x
    x = 843,024,735,354.05/1,280,286.88
  6. Step 6: Final answer
    x = 658,465.50

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Double scale
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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.