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Finding the Fourth Proportional to 987,698.80, 1,480,381.80 and 419,078.80

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Solution

The fourth proportional to 987,698.80, 1,480,381.80 and 419,078.80 is: 628,123.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,698.80 : 1,480,381.80 = 419,078.80 : x
  2. Step 2: Convert to fraction form
    987,698.80/1,480,381.80 = 419,078.80/x
  3. Step 3: Cross multiply
    987,698.80x = 1,480,381.80 × 419,078.80
  4. Step 4: Simplify right side
    987,698.80x = 620,396,628,285.84
  5. Step 5: Solve for x
    x = 620,396,628,285.84/987,698.80
  6. Step 6: Final answer
    x = 628,123.30

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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.