Home / 1,489,987.80-2,234,981.70-890,640.45

Finding the Fourth Proportional to 1,489,987.80, 2,234,981.70 and 890,640.45

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Solution

The fourth proportional to 1,489,987.80, 2,234,981.70 and 890,640.45 is: 1,335,960.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489,987.80 : 2,234,981.70 = 890,640.45 : x
  2. Step 2: Convert to fraction form
    1,489,987.80/2,234,981.70 = 890,640.45/x
  3. Step 3: Cross multiply
    1,489,987.80x = 2,234,981.70 × 890,640.45
  4. Step 4: Simplify right side
    1,489,987.80x = 1,990,565,107,029.77
  5. Step 5: Solve for x
    x = 1,990,565,107,029.77/1,489,987.80
  6. Step 6: Final answer
    x = 1,335,960.68

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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.