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Finding the Fourth Proportional to 299,559,811.40, 419,949,967 and 299,559,811.40

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Solution

The fourth proportional to 299,559,811.40, 419,949,967 and 299,559,811.40 is: 419,949,967

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,559,811.40 : 419,949,967 = 299,559,811.40 : x
  2. Step 2: Convert to fraction form
    299,559,811.40/419,949,967 = 299,559,811.40/x
  3. Step 3: Cross multiply
    299,559,811.40x = 419,949,967 × 299,559,811.40
  4. Step 4: Simplify right side
    299,559,811.40x = 125,800,132,911,956,208
  5. Step 5: Solve for x
    x = 125,800,132,911,956,208/299,559,811.40
  6. Step 6: Final answer
    x = 419,949,967

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.