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Finding the Fourth Proportional to 911,007,978.60, 1,366,511,967.90 and 667,351,684.20

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Solution

The fourth proportional to 911,007,978.60, 1,366,511,967.90 and 667,351,684.20 is: 1,001,027,526.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,007,978.60 : 1,366,511,967.90 = 667,351,684.20 : x
  2. Step 2: Convert to fraction form
    911,007,978.60/1,366,511,967.90 = 667,351,684.20/x
  3. Step 3: Cross multiply
    911,007,978.60x = 1,366,511,967.90 × 667,351,684.20
  4. Step 4: Simplify right side
    911,007,978.60x = 911,944,063,257,521,408
  5. Step 5: Solve for x
    x = 911,944,063,257,521,408/911,007,978.60
  6. Step 6: Final answer
    x = 1,001,027,526.30

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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.