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Finding the Fourth Proportional to 666,355.44, 919,570.50 and 360,431.80

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Solution

The fourth proportional to 666,355.44, 919,570.50 and 360,431.80 is: 497,395.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,355.44 : 919,570.50 = 360,431.80 : x
  2. Step 2: Convert to fraction form
    666,355.44/919,570.50 = 360,431.80/x
  3. Step 3: Cross multiply
    666,355.44x = 919,570.50 × 360,431.80
  4. Step 4: Simplify right side
    666,355.44x = 331,442,450,541.90
  5. Step 5: Solve for x
    x = 331,442,450,541.90/666,355.44
  6. Step 6: Final answer
    x = 497,395.88

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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.