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Finding the Fourth Proportional to 1,986,894.88, 2,980,786.76 and 724,722.52

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Solution

The fourth proportional to 1,986,894.88, 2,980,786.76 and 724,722.52 is: 1,087,245.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,894.88 : 2,980,786.76 = 724,722.52 : x
  2. Step 2: Convert to fraction form
    1,986,894.88/2,980,786.76 = 724,722.52/x
  3. Step 3: Cross multiply
    1,986,894.88x = 2,980,786.76 × 724,722.52
  4. Step 4: Simplify right side
    1,986,894.88x = 2,160,243,292,289.84
  5. Step 5: Solve for x
    x = 2,160,243,292,289.84/1,986,894.88
  6. Step 6: Final answer
    x = 1,087,245.89

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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.