Home / 1,405,451,064.28-1,939,522,652.61-778,959,938.74

Finding the Fourth Proportional to 1,405,451,064.28, 1,939,522,652.61 and 778,959,938.74

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Solution

The fourth proportional to 1,405,451,064.28, 1,939,522,652.61 and 778,959,938.74 is: 1,074,964,817.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,451,064.28 : 1,939,522,652.61 = 778,959,938.74 : x
  2. Step 2: Convert to fraction form
    1,405,451,064.28/1,939,522,652.61 = 778,959,938.74/x
  3. Step 3: Cross multiply
    1,405,451,064.28x = 1,939,522,652.61 × 778,959,938.74
  4. Step 4: Simplify right side
    1,405,451,064.28x = 1,510,810,446,652,230,144
  5. Step 5: Solve for x
    x = 1,510,810,446,652,230,144/1,405,451,064.28
  6. Step 6: Final answer
    x = 1,074,964,817.39

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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.