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Finding the Fourth Proportional to 666,043.20, 919,137.78 and 360,117.48

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Solution

The fourth proportional to 666,043.20, 919,137.78 and 360,117.48 is: 496,961.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,043.20 : 919,137.78 = 360,117.48 : x
  2. Step 2: Convert to fraction form
    666,043.20/919,137.78 = 360,117.48/x
  3. Step 3: Cross multiply
    666,043.20x = 919,137.78 × 360,117.48
  4. Step 4: Simplify right side
    666,043.20x = 330,997,581,106.39
  5. Step 5: Solve for x
    x = 330,997,581,106.39/666,043.20
  6. Step 6: Final answer
    x = 496,961.13

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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.