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Finding the Fourth Proportional to 1,945,878.30, 2,918,817.30 and 986,184.43

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Solution

The fourth proportional to 1,945,878.30, 2,918,817.30 and 986,184.43 is: 1,479,276.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945,878.30 : 2,918,817.30 = 986,184.43 : x
  2. Step 2: Convert to fraction form
    1,945,878.30/2,918,817.30 = 986,184.43/x
  3. Step 3: Cross multiply
    1,945,878.30x = 2,918,817.30 × 986,184.43
  4. Step 4: Simplify right side
    1,945,878.30x = 2,878,492,166,128.50
  5. Step 5: Solve for x
    x = 2,878,492,166,128.50/1,945,878.30
  6. Step 6: Final answer
    x = 1,479,276.56

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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.