Home / 409,787,517.21-565,508,465.89-221,615,807.01

Finding the Fourth Proportional to 409,787,517.21, 565,508,465.89 and 221,615,807.01

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Solution

The fourth proportional to 409,787,517.21, 565,508,465.89 and 221,615,807.01 is: 305,830,728.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,787,517.21 : 565,508,465.89 = 221,615,807.01 : x
  2. Step 2: Convert to fraction form
    409,787,517.21/565,508,465.89 = 221,615,807.01/x
  3. Step 3: Cross multiply
    409,787,517.21x = 565,508,465.89 × 221,615,807.01
  4. Step 4: Simplify right side
    409,787,517.21x = 125,325,615,039,199,392
  5. Step 5: Solve for x
    x = 125,325,615,039,199,392/409,787,517.21
  6. Step 6: Final answer
    x = 305,830,728.79

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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.