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Finding the Fourth Proportional to 418,721, 577,588.74 and 248,945

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Solution

The fourth proportional to 418,721, 577,588.74 and 248,945 is: 343,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,721 : 577,588.74 = 248,945 : x
  2. Step 2: Convert to fraction form
    418,721/577,588.74 = 248,945/x
  3. Step 3: Cross multiply
    418,721x = 577,588.74 × 248,945
  4. Step 4: Simplify right side
    418,721x = 143,787,828,879.30
  5. Step 5: Solve for x
    x = 143,787,828,879.30/418,721
  6. Step 6: Final answer
    x = 343,397.70

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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.