Home / 1,279,435,142.88-1,919,152,728.96-310,086,758.88

Finding the Fourth Proportional to 1,279,435,142.88, 1,919,152,728.96 and 310,086,758.88

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Solution

The fourth proportional to 1,279,435,142.88, 1,919,152,728.96 and 310,086,758.88 is: 465,130,141.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,435,142.88 : 1,919,152,728.96 = 310,086,758.88 : x
  2. Step 2: Convert to fraction form
    1,279,435,142.88/1,919,152,728.96 = 310,086,758.88/x
  3. Step 3: Cross multiply
    1,279,435,142.88x = 1,919,152,728.96 × 310,086,758.88
  4. Step 4: Simplify right side
    1,279,435,142.88x = 595,103,849,518,913,536
  5. Step 5: Solve for x
    x = 595,103,849,518,913,536/1,279,435,142.88
  6. Step 6: Final answer
    x = 465,130,141.87

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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.