Home / 640,987,772.40-962,489,428.20-368,889,980.40

Finding the Fourth Proportional to 640,987,772.40, 962,489,428.20 and 368,889,980.40

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Solution

The fourth proportional to 640,987,772.40, 962,489,428.20 and 368,889,980.40 is: 553,914,944.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,987,772.40 : 962,489,428.20 = 368,889,980.40 : x
  2. Step 2: Convert to fraction form
    640,987,772.40/962,489,428.20 = 368,889,980.40/x
  3. Step 3: Cross multiply
    640,987,772.40x = 962,489,428.20 × 368,889,980.40
  4. Step 4: Simplify right side
    640,987,772.40x = 355,052,706,303,905,216
  5. Step 5: Solve for x
    x = 355,052,706,303,905,216/640,987,772.40
  6. Step 6: Final answer
    x = 553,914,944.39

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1.5x scale

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.