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Finding the Fourth Proportional to 642,619.72, 886,800.03 and 356,133.64

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Solution

The fourth proportional to 642,619.72, 886,800.03 and 356,133.64 is: 491,456.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,619.72 : 886,800.03 = 356,133.64 : x
  2. Step 2: Convert to fraction form
    642,619.72/886,800.03 = 356,133.64/x
  3. Step 3: Cross multiply
    642,619.72x = 886,800.03 × 356,133.64
  4. Step 4: Simplify right side
    642,619.72x = 315,819,322,636.01
  5. Step 5: Solve for x
    x = 315,819,322,636.01/642,619.72
  6. Step 6: Final answer
    x = 491,456.01

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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.