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Finding the Fourth Proportional to 478,493.18, 660,335.56 and 274,581.44

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Solution

The fourth proportional to 478,493.18, 660,335.56 and 274,581.44 is: 378,930.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,493.18 : 660,335.56 = 274,581.44 : x
  2. Step 2: Convert to fraction form
    478,493.18/660,335.56 = 274,581.44/x
  3. Step 3: Cross multiply
    478,493.18x = 660,335.56 × 274,581.44
  4. Step 4: Simplify right side
    478,493.18x = 181,315,888,948.01
  5. Step 5: Solve for x
    x = 181,315,888,948.01/478,493.18
  6. Step 6: Final answer
    x = 378,930.98

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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.