Home / 387,885,721.50-535,293,665.51-211,685,046.12

Finding the Fourth Proportional to 387,885,721.50, 535,293,665.51 and 211,685,046.12

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Solution

The fourth proportional to 387,885,721.50, 535,293,665.51 and 211,685,046.12 is: 292,131,568.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,885,721.50 : 535,293,665.51 = 211,685,046.12 : x
  2. Step 2: Convert to fraction form
    387,885,721.50/535,293,665.51 = 211,685,046.12/x
  3. Step 3: Cross multiply
    387,885,721.50x = 535,293,665.51 × 211,685,046.12
  4. Step 4: Simplify right side
    387,885,721.50x = 113,313,664,270,169,776
  5. Step 5: Solve for x
    x = 113,313,664,270,169,776/387,885,721.50
  6. Step 6: Final answer
    x = 292,131,568.63

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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.