Home / 1,319,302,778.20-1,979,178,116.10-399,171,808.60

Finding the Fourth Proportional to 1,319,302,778.20, 1,979,178,116.10 and 399,171,808.60

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Solution

The fourth proportional to 1,319,302,778.20, 1,979,178,116.10 and 399,171,808.60 is: 598,825,471.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,302,778.20 : 1,979,178,116.10 = 399,171,808.60 : x
  2. Step 2: Convert to fraction form
    1,319,302,778.20/1,979,178,116.10 = 399,171,808.60/x
  3. Step 3: Cross multiply
    1,319,302,778.20x = 1,979,178,116.10 × 399,171,808.60
  4. Step 4: Simplify right side
    1,319,302,778.20x = 790,032,108,145,177,728
  5. Step 5: Solve for x
    x = 790,032,108,145,177,728/1,319,302,778.20
  6. Step 6: Final answer
    x = 598,825,471.45

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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.