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Finding the Fourth Proportional to 666,621.06, 919,930.50 and 360,690.71

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Solution

The fourth proportional to 666,621.06, 919,930.50 and 360,690.71 is: 497,749.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,621.06 : 919,930.50 = 360,690.71 : x
  2. Step 2: Convert to fraction form
    666,621.06/919,930.50 = 360,690.71/x
  3. Step 3: Cross multiply
    666,621.06x = 919,930.50 × 360,690.71
  4. Step 4: Simplify right side
    666,621.06x = 331,810,380,596.00
  5. Step 5: Solve for x
    x = 331,810,380,596.00/666,621.06
  6. Step 6: Final answer
    x = 497,749.62

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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.