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Finding the Fourth Proportional to 1,200,936, 1,657,344 and 664,392

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Solution

The fourth proportional to 1,200,936, 1,657,344 and 664,392 is: 916,889.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,936 : 1,657,344 = 664,392 : x
  2. Step 2: Convert to fraction form
    1,200,936/1,657,344 = 664,392/x
  3. Step 3: Cross multiply
    1,200,936x = 1,657,344 × 664,392
  4. Step 4: Simplify right side
    1,200,936x = 1,101,126,094,848
  5. Step 5: Solve for x
    x = 1,101,126,094,848/1,200,936
  6. Step 6: Final answer
    x = 916,889.90

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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.