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Finding the Fourth Proportional to 874,891,216.40, 1,312,336,824.60 and 808,378,422.80

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Solution

The fourth proportional to 874,891,216.40, 1,312,336,824.60 and 808,378,422.80 is: 1,212,567,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,891,216.40 : 1,312,336,824.60 = 808,378,422.80 : x
  2. Step 2: Convert to fraction form
    874,891,216.40/1,312,336,824.60 = 808,378,422.80/x
  3. Step 3: Cross multiply
    874,891,216.40x = 1,312,336,824.60 × 808,378,422.80
  4. Step 4: Simplify right side
    874,891,216.40x = 1,060,864,772,452,508,160
  5. Step 5: Solve for x
    x = 1,060,864,772,452,508,160/874,891,216.40
  6. Step 6: Final answer
    x = 1,212,567,634.20

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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.