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Finding the Fourth Proportional to 891,651,612.80, 1,336,201,960.80 and 656,648,402.60

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Solution

The fourth proportional to 891,651,612.80, 1,336,201,960.80 and 656,648,402.60 is: 984,033,304.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,651,612.80 : 1,336,201,960.80 = 656,648,402.60 : x
  2. Step 2: Convert to fraction form
    891,651,612.80/1,336,201,960.80 = 656,648,402.60/x
  3. Step 3: Cross multiply
    891,651,612.80x = 1,336,201,960.80 × 656,648,402.60
  4. Step 4: Simplify right side
    891,651,612.80x = 877,414,883,110,307,840
  5. Step 5: Solve for x
    x = 877,414,883,110,307,840/891,651,612.80
  6. Step 6: Final answer
    x = 984,033,304.62

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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.