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Finding the Fourth Proportional to 666,463.94, 919,064.91 and 611,142.56

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Solution

The fourth proportional to 666,463.94, 919,064.91 and 611,142.56 is: 842,775.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,463.94 : 919,064.91 = 611,142.56 : x
  2. Step 2: Convert to fraction form
    666,463.94/919,064.91 = 611,142.56/x
  3. Step 3: Cross multiply
    666,463.94x = 919,064.91 × 611,142.56
  4. Step 4: Simplify right side
    666,463.94x = 561,679,681,903.57
  5. Step 5: Solve for x
    x = 561,679,681,903.57/666,463.94
  6. Step 6: Final answer
    x = 842,775.80

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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.