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Finding the Fourth Proportional to 478,491.72, 660,333.48 and 274,579.98

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Solution

The fourth proportional to 478,491.72, 660,333.48 and 274,579.98 is: 378,928.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,491.72 : 660,333.48 = 274,579.98 : x
  2. Step 2: Convert to fraction form
    478,491.72/660,333.48 = 274,579.98/x
  3. Step 3: Cross multiply
    478,491.72x = 660,333.48 × 274,579.98
  4. Step 4: Simplify right side
    478,491.72x = 181,314,353,731.73
  5. Step 5: Solve for x
    x = 181,314,353,731.73/478,491.72
  6. Step 6: Final answer
    x = 378,928.93

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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.