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Finding the Fourth Proportional to 1,207,974.94, 1,666,962.92 and 664,106.78

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Solution

The fourth proportional to 1,207,974.94, 1,666,962.92 and 664,106.78 is: 916,444.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,974.94 : 1,666,962.92 = 664,106.78 : x
  2. Step 2: Convert to fraction form
    1,207,974.94/1,666,962.92 = 664,106.78/x
  3. Step 3: Cross multiply
    1,207,974.94x = 1,666,962.92 × 664,106.78
  4. Step 4: Simplify right side
    1,207,974.94x = 1,107,041,383,008.27
  5. Step 5: Solve for x
    x = 1,107,041,383,008.27/1,207,974.94
  6. Step 6: Final answer
    x = 916,444.00

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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.