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Finding the Fourth Proportional to 660,879,201.60, 990,468,496.80 and 401,819,428.80

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Solution

The fourth proportional to 660,879,201.60, 990,468,496.80 and 401,819,428.80 is: 602,212,151.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,879,201.60 : 990,468,496.80 = 401,819,428.80 : x
  2. Step 2: Convert to fraction form
    660,879,201.60/990,468,496.80 = 401,819,428.80/x
  3. Step 3: Cross multiply
    660,879,201.60x = 990,468,496.80 × 401,819,428.80
  4. Step 4: Simplify right side
    660,879,201.60x = 397,989,485,628,570,624
  5. Step 5: Solve for x
    x = 397,989,485,628,570,624/660,879,201.60
  6. Step 6: Final answer
    x = 602,212,151.12

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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.