Home / 1,391,304.99-1,920,939.72-868,813.86

Finding the Fourth Proportional to 1,391,304.99, 1,920,939.72 and 868,813.86

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Solution

The fourth proportional to 1,391,304.99, 1,920,939.72 and 868,813.86 is: 1,199,549.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,304.99 : 1,920,939.72 = 868,813.86 : x
  2. Step 2: Convert to fraction form
    1,391,304.99/1,920,939.72 = 868,813.86/x
  3. Step 3: Cross multiply
    1,391,304.99x = 1,920,939.72 × 868,813.86
  4. Step 4: Simplify right side
    1,391,304.99x = 1,668,939,052,960.52
  5. Step 5: Solve for x
    x = 1,668,939,052,960.52/1,391,304.99
  6. Step 6: Final answer
    x = 1,199,549.39

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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.