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Finding the Fourth Proportional to 666,142.28, 919,274.72 and 375,752.86

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Solution

The fourth proportional to 666,142.28, 919,274.72 and 375,752.86 is: 518,538.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,142.28 : 919,274.72 = 375,752.86 : x
  2. Step 2: Convert to fraction form
    666,142.28/919,274.72 = 375,752.86/x
  3. Step 3: Cross multiply
    666,142.28x = 919,274.72 × 375,752.86
  4. Step 4: Simplify right side
    666,142.28x = 345,420,105,165.70
  5. Step 5: Solve for x
    x = 345,420,105,165.70/666,142.28
  6. Step 6: Final answer
    x = 518,538.03

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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.