Home / 1,319,302,777.70-1,979,178,115.35-399,171,808.10

Finding the Fourth Proportional to 1,319,302,777.70, 1,979,178,115.35 and 399,171,808.10

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Solution

The fourth proportional to 1,319,302,777.70, 1,979,178,115.35 and 399,171,808.10 is: 598,825,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,302,777.70 : 1,979,178,115.35 = 399,171,808.10 : x
  2. Step 2: Convert to fraction form
    1,319,302,777.70/1,979,178,115.35 = 399,171,808.10/x
  3. Step 3: Cross multiply
    1,319,302,777.70x = 1,979,178,115.35 × 399,171,808.10
  4. Step 4: Simplify right side
    1,319,302,777.70x = 790,032,106,856,209,920
  5. Step 5: Solve for x
    x = 790,032,106,856,209,920/1,319,302,777.70
  6. Step 6: Final answer
    x = 598,825,470.70

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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.