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Finding the Fourth Proportional to 485,313.17, 728,076.69 and 148,379.72

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Solution

The fourth proportional to 485,313.17, 728,076.69 and 148,379.72 is: 222,602.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,313.17 : 728,076.69 = 148,379.72 : x
  2. Step 2: Convert to fraction form
    485,313.17/728,076.69 = 148,379.72/x
  3. Step 3: Cross multiply
    485,313.17x = 728,076.69 × 148,379.72
  4. Step 4: Simplify right side
    485,313.17x = 108,031,811,760.34
  5. Step 5: Solve for x
    x = 108,031,811,760.34/485,313.17
  6. Step 6: Final answer
    x = 222,602.27

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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.