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Finding the Fourth Proportional to 440,651.40, 660,977.10 and 418,878.60

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Solution

The fourth proportional to 440,651.40, 660,977.10 and 418,878.60 is: 628,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,651.40 : 660,977.10 = 418,878.60 : x
  2. Step 2: Convert to fraction form
    440,651.40/660,977.10 = 418,878.60/x
  3. Step 3: Cross multiply
    440,651.40x = 660,977.10 × 418,878.60
  4. Step 4: Simplify right side
    440,651.40x = 276,869,162,280.06
  5. Step 5: Solve for x
    x = 276,869,162,280.06/440,651.40
  6. Step 6: Final answer
    x = 628,317.90

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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.