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Finding the Fourth Proportional to 1,885,752.80, 2,828,629.20 and 687,714.20

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Solution

The fourth proportional to 1,885,752.80, 2,828,629.20 and 687,714.20 is: 1,031,571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885,752.80 : 2,828,629.20 = 687,714.20 : x
  2. Step 2: Convert to fraction form
    1,885,752.80/2,828,629.20 = 687,714.20/x
  3. Step 3: Cross multiply
    1,885,752.80x = 2,828,629.20 × 687,714.20
  4. Step 4: Simplify right side
    1,885,752.80x = 1,945,288,467,374.64
  5. Step 5: Solve for x
    x = 1,945,288,467,374.64/1,885,752.80
  6. Step 6: Final answer
    x = 1,031,571.30

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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.