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Finding the Fourth Proportional to 2,628,981.79, 3,628,005.80 and 1,421,757.79

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Solution

The fourth proportional to 2,628,981.79, 3,628,005.80 and 1,421,757.79 is: 1,962,031.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628,981.79 : 3,628,005.80 = 1,421,757.79 : x
  2. Step 2: Convert to fraction form
    2,628,981.79/3,628,005.80 = 1,421,757.79/x
  3. Step 3: Cross multiply
    2,628,981.79x = 3,628,005.80 × 1,421,757.79
  4. Step 4: Simplify right side
    2,628,981.79x = 5,158,145,508,315.18
  5. Step 5: Solve for x
    x = 5,158,145,508,315.18/2,628,981.79
  6. Step 6: Final answer
    x = 1,962,031.66

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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.