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Finding the Fourth Proportional to 1,202,421, 1,659,393.14 and 665,877

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Solution

The fourth proportional to 1,202,421, 1,659,393.14 and 665,877 is: 918,939.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202,421 : 1,659,393.14 = 665,877 : x
  2. Step 2: Convert to fraction form
    1,202,421/1,659,393.14 = 665,877/x
  3. Step 3: Cross multiply
    1,202,421x = 1,659,393.14 × 665,877
  4. Step 4: Simplify right side
    1,202,421x = 1,104,951,725,883.78
  5. Step 5: Solve for x
    x = 1,104,951,725,883.78/1,202,421
  6. Step 6: Final answer
    x = 918,939.15

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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.