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Finding the Fourth Proportional to 507,820.78, 761,805 and 271,034.32

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Solution

The fourth proportional to 507,820.78, 761,805 and 271,034.32 is: 406,590.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,820.78 : 761,805 = 271,034.32 : x
  2. Step 2: Convert to fraction form
    507,820.78/761,805 = 271,034.32/x
  3. Step 3: Cross multiply
    507,820.78x = 761,805 × 271,034.32
  4. Step 4: Simplify right side
    507,820.78x = 206,475,300,147.60
  5. Step 5: Solve for x
    x = 206,475,300,147.60/507,820.78
  6. Step 6: Final answer
    x = 406,590.88

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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.