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Finding the Fourth Proportional to 666,143.28, 919,276.10 and 375,753.86

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Solution

The fourth proportional to 666,143.28, 919,276.10 and 375,753.86 is: 518,539.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,143.28 : 919,276.10 = 375,753.86 : x
  2. Step 2: Convert to fraction form
    666,143.28/919,276.10 = 375,753.86/x
  3. Step 3: Cross multiply
    666,143.28x = 919,276.10 × 375,753.86
  4. Step 4: Simplify right side
    666,143.28x = 345,421,542,980.75
  5. Step 5: Solve for x
    x = 345,421,542,980.75/666,143.28
  6. Step 6: Final answer
    x = 518,539.41

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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.