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Finding the Fourth Proportional to 1,120,367,978.60, 1,679,418,227.10 and 660,069,213.80

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Solution

The fourth proportional to 1,120,367,978.60, 1,679,418,227.10 and 660,069,213.80 is: 989,435,872.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,367,978.60 : 1,679,418,227.10 = 660,069,213.80 : x
  2. Step 2: Convert to fraction form
    1,120,367,978.60/1,679,418,227.10 = 660,069,213.80/x
  3. Step 3: Cross multiply
    1,120,367,978.60x = 1,679,418,227.10 × 660,069,213.80
  4. Step 4: Simplify right side
    1,120,367,978.60x = 1,108,532,268,803,286,656
  5. Step 5: Solve for x
    x = 1,108,532,268,803,286,656/1,120,367,978.60
  6. Step 6: Final answer
    x = 989,435,872.84

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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.