Home / 428,025,643.20-642,038,464.80-280,072,468.80

Finding the Fourth Proportional to 428,025,643.20, 642,038,464.80 and 280,072,468.80

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Solution

The fourth proportional to 428,025,643.20, 642,038,464.80 and 280,072,468.80 is: 420,108,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,025,643.20 : 642,038,464.80 = 280,072,468.80 : x
  2. Step 2: Convert to fraction form
    428,025,643.20/642,038,464.80 = 280,072,468.80/x
  3. Step 3: Cross multiply
    428,025,643.20x = 642,038,464.80 × 280,072,468.80
  4. Step 4: Simplify right side
    428,025,643.20x = 179,817,297,901,097,888
  5. Step 5: Solve for x
    x = 179,817,297,901,097,888/428,025,643.20
  6. Step 6: Final answer
    x = 420,108,703.20

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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.