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Finding the Fourth Proportional to 988,647,419.20, 1,482,971,128.80 and 759,771,745.60

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Solution

The fourth proportional to 988,647,419.20, 1,482,971,128.80 and 759,771,745.60 is: 1,139,657,618.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,647,419.20 : 1,482,971,128.80 = 759,771,745.60 : x
  2. Step 2: Convert to fraction form
    988,647,419.20/1,482,971,128.80 = 759,771,745.60/x
  3. Step 3: Cross multiply
    988,647,419.20x = 1,482,971,128.80 × 759,771,745.60
  4. Step 4: Simplify right side
    988,647,419.20x = 1,126,719,563,202,778,496
  5. Step 5: Solve for x
    x = 1,126,719,563,202,778,496/988,647,419.20
  6. Step 6: Final answer
    x = 1,139,657,618.40

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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.