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Finding the Fourth Proportional to 1,398,541,803.12, 1,929,964,446.36 and 771,994,024.56

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Solution

The fourth proportional to 1,398,541,803.12, 1,929,964,446.36 and 771,994,024.56 is: 1,065,338,924.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,541,803.12 : 1,929,964,446.36 = 771,994,024.56 : x
  2. Step 2: Convert to fraction form
    1,398,541,803.12/1,929,964,446.36 = 771,994,024.56/x
  3. Step 3: Cross multiply
    1,398,541,803.12x = 1,929,964,446.36 × 771,994,024.56
  4. Step 4: Simplify right side
    1,398,541,803.12x = 1,489,921,020,203,168,512
  5. Step 5: Solve for x
    x = 1,489,921,020,203,168,512/1,398,541,803.12
  6. Step 6: Final answer
    x = 1,065,338,924.36

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.