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Finding the Fourth Proportional to 891,651,611.80, 1,336,201,959.30 and 656,648,401.60

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Solution

The fourth proportional to 891,651,611.80, 1,336,201,959.30 and 656,648,401.60 is: 984,033,303.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,651,611.80 : 1,336,201,959.30 = 656,648,401.60 : x
  2. Step 2: Convert to fraction form
    891,651,611.80/1,336,201,959.30 = 656,648,401.60/x
  3. Step 3: Cross multiply
    891,651,611.80x = 1,336,201,959.30 × 656,648,401.60
  4. Step 4: Simplify right side
    891,651,611.80x = 877,414,880,789,133,312
  5. Step 5: Solve for x
    x = 877,414,880,789,133,312/891,651,611.80
  6. Step 6: Final answer
    x = 984,033,303.12

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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.