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Finding the Fourth Proportional to 978,631.60, 1,466,197.80 and 800,172.40

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Solution

The fourth proportional to 978,631.60, 1,466,197.80 and 800,172.40 is: 1,198,828.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,631.60 : 1,466,197.80 = 800,172.40 : x
  2. Step 2: Convert to fraction form
    978,631.60/1,466,197.80 = 800,172.40/x
  3. Step 3: Cross multiply
    978,631.60x = 1,466,197.80 × 800,172.40
  4. Step 4: Simplify right side
    978,631.60x = 1,173,211,012,500.72
  5. Step 5: Solve for x
    x = 1,173,211,012,500.72/978,631.60
  6. Step 6: Final answer
    x = 1,198,828.05

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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.