Home / 919,641,488.65-1,380,071,490.06-505,407,586.66

Finding the Fourth Proportional to 919,641,488.65, 1,380,071,490.06 and 505,407,586.66

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Solution

The fourth proportional to 919,641,488.65, 1,380,071,490.06 and 505,407,586.66 is: 758,446,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,641,488.65 : 1,380,071,490.06 = 505,407,586.66 : x
  2. Step 2: Convert to fraction form
    919,641,488.65/1,380,071,490.06 = 505,407,586.66/x
  3. Step 3: Cross multiply
    919,641,488.65x = 1,380,071,490.06 × 505,407,586.66
  4. Step 4: Simplify right side
    919,641,488.65x = 697,498,601,209,494,784
  5. Step 5: Solve for x
    x = 697,498,601,209,494,784/919,641,488.65
  6. Step 6: Final answer
    x = 758,446,209.55

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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.