Home / 1,207,815.32-1,666,790.55-663,986.09

Finding the Fourth Proportional to 1,207,815.32, 1,666,790.55 and 663,986.09

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Solution

The fourth proportional to 1,207,815.32, 1,666,790.55 and 663,986.09 is: 916,303.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,815.32 : 1,666,790.55 = 663,986.09 : x
  2. Step 2: Convert to fraction form
    1,207,815.32/1,666,790.55 = 663,986.09/x
  3. Step 3: Cross multiply
    1,207,815.32x = 1,666,790.55 × 663,986.09
  4. Step 4: Simplify right side
    1,207,815.32x = 1,106,725,740,143.45
  5. Step 5: Solve for x
    x = 1,106,725,740,143.45/1,207,815.32
  6. Step 6: Final answer
    x = 916,303.78

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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.