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Finding the Fourth Proportional to 660,323,674.40, 990,485,511.60 and 650,120,007.20

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Solution

The fourth proportional to 660,323,674.40, 990,485,511.60 and 650,120,007.20 is: 975,180,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,323,674.40 : 990,485,511.60 = 650,120,007.20 : x
  2. Step 2: Convert to fraction form
    660,323,674.40/990,485,511.60 = 650,120,007.20/x
  3. Step 3: Cross multiply
    660,323,674.40x = 990,485,511.60 × 650,120,007.20
  4. Step 4: Simplify right side
    660,323,674.40x = 643,934,447,932,887,808
  5. Step 5: Solve for x
    x = 643,934,447,932,887,808/660,323,674.40
  6. Step 6: Final answer
    x = 975,180,010.80

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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.