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Finding the Fourth Proportional to 576,763.78, 795,929.34 and 318,640.54

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Solution

The fourth proportional to 576,763.78, 795,929.34 and 318,640.54 is: 439,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,763.78 : 795,929.34 = 318,640.54 : x
  2. Step 2: Convert to fraction form
    576,763.78/795,929.34 = 318,640.54/x
  3. Step 3: Cross multiply
    576,763.78x = 795,929.34 × 318,640.54
  4. Step 4: Simplify right side
    576,763.78x = 253,615,354,699.44
  5. Step 5: Solve for x
    x = 253,615,354,699.44/576,763.78
  6. Step 6: Final answer
    x = 439,721.36

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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.