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Finding the Fourth Proportional to 666,305.31, 919,501.49 and 375,978.51

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Solution

The fourth proportional to 666,305.31, 919,501.49 and 375,978.51 is: 518,850.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,305.31 : 919,501.49 = 375,978.51 : x
  2. Step 2: Convert to fraction form
    666,305.31/919,501.49 = 375,978.51/x
  3. Step 3: Cross multiply
    666,305.31x = 919,501.49 × 375,978.51
  4. Step 4: Simplify right side
    666,305.31x = 345,712,800,152.98
  5. Step 5: Solve for x
    x = 345,712,800,152.98/666,305.31
  6. Step 6: Final answer
    x = 518,850.44

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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.