Home / 1,426,410,159.12-2,139,631,711.84-430,439,817.78

Finding the Fourth Proportional to 1,426,410,159.12, 2,139,631,711.84 and 430,439,817.78

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Solution

The fourth proportional to 1,426,410,159.12, 2,139,631,711.84 and 430,439,817.78 is: 645,664,697.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426,410,159.12 : 2,139,631,711.84 = 430,439,817.78 : x
  2. Step 2: Convert to fraction form
    1,426,410,159.12/2,139,631,711.84 = 430,439,817.78/x
  3. Step 3: Cross multiply
    1,426,410,159.12x = 2,139,631,711.84 × 430,439,817.78
  4. Step 4: Simplify right side
    1,426,410,159.12x = 920,982,684,160,718,976
  5. Step 5: Solve for x
    x = 920,982,684,160,718,976/1,426,410,159.12
  6. Step 6: Final answer
    x = 645,664,697.68

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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.