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Finding the Fourth Proportional to 666,462.94, 919,063.53 and 611,141.56

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Solution

The fourth proportional to 666,462.94, 919,063.53 and 611,141.56 is: 842,774.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,462.94 : 919,063.53 = 611,141.56 : x
  2. Step 2: Convert to fraction form
    666,462.94/919,063.53 = 611,141.56/x
  3. Step 3: Cross multiply
    666,462.94x = 919,063.53 × 611,141.56
  4. Step 4: Simplify right side
    666,462.94x = 561,677,919,463.31
  5. Step 5: Solve for x
    x = 561,677,919,463.31/666,462.94
  6. Step 6: Final answer
    x = 842,774.42

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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.