Home / 778,045,447.64-1,073,699,507.42-420,813,623.20

Finding the Fourth Proportional to 778,045,447.64, 1,073,699,507.42 and 420,813,623.20

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Solution

The fourth proportional to 778,045,447.64, 1,073,699,507.42 and 420,813,623.20 is: 580,721,063.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,045,447.64 : 1,073,699,507.42 = 420,813,623.20 : x
  2. Step 2: Convert to fraction form
    778,045,447.64/1,073,699,507.42 = 420,813,623.20/x
  3. Step 3: Cross multiply
    778,045,447.64x = 1,073,699,507.42 × 420,813,623.20
  4. Step 4: Simplify right side
    778,045,447.64x = 451,827,379,945,465,472
  5. Step 5: Solve for x
    x = 451,827,379,945,465,472/778,045,447.64
  6. Step 6: Final answer
    x = 580,721,063.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.