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Finding the Fourth Proportional to 978,221,480.80, 1,469,032,832.40 and 519,056,456.80

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Solution

The fourth proportional to 978,221,480.80, 1,469,032,832.40 and 519,056,456.80 is: 779,487,050.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,221,480.80 : 1,469,032,832.40 = 519,056,456.80 : x
  2. Step 2: Convert to fraction form
    978,221,480.80/1,469,032,832.40 = 519,056,456.80/x
  3. Step 3: Cross multiply
    978,221,480.80x = 1,469,032,832.40 × 519,056,456.80
  4. Step 4: Simplify right side
    978,221,480.80x = 762,510,976,908,412,288
  5. Step 5: Solve for x
    x = 762,510,976,908,412,288/978,221,480.80
  6. Step 6: Final answer
    x = 779,487,050.61

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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.