Home / 1,328,910.40-1,992,479.85-645,615.06

Finding the Fourth Proportional to 1,328,910.40, 1,992,479.85 and 645,615.06

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Solution

The fourth proportional to 1,328,910.40, 1,992,479.85 and 645,615.06 is: 967,992.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,910.40 : 1,992,479.85 = 645,615.06 : x
  2. Step 2: Convert to fraction form
    1,328,910.40/1,992,479.85 = 645,615.06/x
  3. Step 3: Cross multiply
    1,328,910.40x = 1,992,479.85 × 645,615.06
  4. Step 4: Simplify right side
    1,328,910.40x = 1,286,374,990,434.74
  5. Step 5: Solve for x
    x = 1,286,374,990,434.74/1,328,910.40
  6. Step 6: Final answer
    x = 967,992.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.