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Finding the Fourth Proportional to 666,139.95, 919,252.45 and 375,747.27

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Solution

The fourth proportional to 666,139.95, 919,252.45 and 375,747.27 is: 518,519.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,139.95 : 919,252.45 = 375,747.27 : x
  2. Step 2: Convert to fraction form
    666,139.95/919,252.45 = 375,747.27/x
  3. Step 3: Cross multiply
    666,139.95x = 919,252.45 × 375,747.27
  4. Step 4: Simplify right side
    666,139.95x = 345,406,598,608.02
  5. Step 5: Solve for x
    x = 345,406,598,608.02/666,139.95
  6. Step 6: Final answer
    x = 518,519.57

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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.