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Finding the Fourth Proportional to 662,318,193.60, 993,477,290.40 and 403,400,138.40

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Solution

The fourth proportional to 662,318,193.60, 993,477,290.40 and 403,400,138.40 is: 605,100,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,318,193.60 : 993,477,290.40 = 403,400,138.40 : x
  2. Step 2: Convert to fraction form
    662,318,193.60/993,477,290.40 = 403,400,138.40/x
  3. Step 3: Cross multiply
    662,318,193.60x = 993,477,290.40 × 403,400,138.40
  4. Step 4: Simplify right side
    662,318,193.60x = 400,768,876,444,616,960
  5. Step 5: Solve for x
    x = 400,768,876,444,616,960/662,318,193.60
  6. Step 6: Final answer
    x = 605,100,207.60

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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.