Home / 640,962,446.48-962,543,939.92-393,421,290.56

Finding the Fourth Proportional to 640,962,446.48, 962,543,939.92 and 393,421,290.56

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Solution

The fourth proportional to 640,962,446.48, 962,543,939.92 and 393,421,290.56 is: 590,807,279.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,962,446.48 : 962,543,939.92 = 393,421,290.56 : x
  2. Step 2: Convert to fraction form
    640,962,446.48/962,543,939.92 = 393,421,290.56/x
  3. Step 3: Cross multiply
    640,962,446.48x = 962,543,939.92 × 393,421,290.56
  4. Step 4: Simplify right side
    640,962,446.48x = 378,685,279,064,033,472
  5. Step 5: Solve for x
    x = 378,685,279,064,033,472/640,962,446.48
  6. Step 6: Final answer
    x = 590,807,279.18

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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.