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Finding the Fourth Proportional to 644,165.69, 888,749.30 and 372,134.31

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Solution

The fourth proportional to 644,165.69, 888,749.30 and 372,134.31 is: 513,430.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,165.69 : 888,749.30 = 372,134.31 : x
  2. Step 2: Convert to fraction form
    644,165.69/888,749.30 = 372,134.31/x
  3. Step 3: Cross multiply
    644,165.69x = 888,749.30 × 372,134.31
  4. Step 4: Simplify right side
    644,165.69x = 330,734,105,657.81
  5. Step 5: Solve for x
    x = 330,734,105,657.81/644,165.69
  6. Step 6: Final answer
    x = 513,430.18

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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.