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Finding the Fourth Proportional to 666,443.88, 919,669.68 and 380,056.14

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Solution

The fourth proportional to 666,443.88, 919,669.68 and 380,056.14 is: 524,464.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,443.88 : 919,669.68 = 380,056.14 : x
  2. Step 2: Convert to fraction form
    666,443.88/919,669.68 = 380,056.14/x
  3. Step 3: Cross multiply
    666,443.88x = 919,669.68 × 380,056.14
  4. Step 4: Simplify right side
    666,443.88x = 349,526,108,655.84
  5. Step 5: Solve for x
    x = 349,526,108,655.84/666,443.88
  6. Step 6: Final answer
    x = 524,464.43

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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.