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Finding the Fourth Proportional to 666,243.91, 919,419.42 and 360,320.35

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Solution

The fourth proportional to 666,243.91, 919,419.42 and 360,320.35 is: 497,243.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,243.91 : 919,419.42 = 360,320.35 : x
  2. Step 2: Convert to fraction form
    666,243.91/919,419.42 = 360,320.35/x
  3. Step 3: Cross multiply
    666,243.91x = 919,419.42 × 360,320.35
  4. Step 4: Simplify right side
    666,243.91x = 331,285,527,211.20
  5. Step 5: Solve for x
    x = 331,285,527,211.20/666,243.91
  6. Step 6: Final answer
    x = 497,243.61

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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.