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Finding the Fourth Proportional to 1,989,934.18, 2,984,609.66 and 978,784.72

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Solution

The fourth proportional to 1,989,934.18, 2,984,609.66 and 978,784.72 is: 1,468,033.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,934.18 : 2,984,609.66 = 978,784.72 : x
  2. Step 2: Convert to fraction form
    1,989,934.18/2,984,609.66 = 978,784.72/x
  3. Step 3: Cross multiply
    1,989,934.18x = 2,984,609.66 × 978,784.72
  4. Step 4: Simplify right side
    1,989,934.18x = 2,921,290,318,016.95
  5. Step 5: Solve for x
    x = 2,921,290,318,016.95/1,989,934.18
  6. Step 6: Final answer
    x = 1,468,033.64

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.