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Finding the Fourth Proportional to 1,777,977.20, 2,666,965.80 and 981,714.80

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Solution

The fourth proportional to 1,777,977.20, 2,666,965.80 and 981,714.80 is: 1,472,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777,977.20 : 2,666,965.80 = 981,714.80 : x
  2. Step 2: Convert to fraction form
    1,777,977.20/2,666,965.80 = 981,714.80/x
  3. Step 3: Cross multiply
    1,777,977.20x = 2,666,965.80 × 981,714.80
  4. Step 4: Simplify right side
    1,777,977.20x = 2,618,199,796,953.84
  5. Step 5: Solve for x
    x = 2,618,199,796,953.84/1,777,977.20
  6. Step 6: Final answer
    x = 1,472,572.20

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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.