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Finding the Fourth Proportional to 478,018.11, 717,090.53 and 253,493.31

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Solution

The fourth proportional to 478,018.11, 717,090.53 and 253,493.31 is: 380,273.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,018.11 : 717,090.53 = 253,493.31 : x
  2. Step 2: Convert to fraction form
    478,018.11/717,090.53 = 253,493.31/x
  3. Step 3: Cross multiply
    478,018.11x = 717,090.53 × 253,493.31
  4. Step 4: Simplify right side
    478,018.11x = 181,777,650,751.89
  5. Step 5: Solve for x
    x = 181,777,650,751.89/478,018.11
  6. Step 6: Final answer
    x = 380,273.56

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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.