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Finding the Fourth Proportional to 978,905,458.80, 1,468,358,188.20 and 897,276,121.20

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Solution

The fourth proportional to 978,905,458.80, 1,468,358,188.20 and 897,276,121.20 is: 1,345,914,181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,905,458.80 : 1,468,358,188.20 = 897,276,121.20 : x
  2. Step 2: Convert to fraction form
    978,905,458.80/1,468,358,188.20 = 897,276,121.20/x
  3. Step 3: Cross multiply
    978,905,458.80x = 1,468,358,188.20 × 897,276,121.20
  4. Step 4: Simplify right side
    978,905,458.80x = 1,317,522,739,640,355,840
  5. Step 5: Solve for x
    x = 1,317,522,739,640,355,840/978,905,458.80
  6. Step 6: Final answer
    x = 1,345,914,181.80

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1.5x scale

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.