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Finding the Fourth Proportional to 663,669,820.80, 995,504,731.20 and 621,202,492.80

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Solution

The fourth proportional to 663,669,820.80, 995,504,731.20 and 621,202,492.80 is: 931,803,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,669,820.80 : 995,504,731.20 = 621,202,492.80 : x
  2. Step 2: Convert to fraction form
    663,669,820.80/995,504,731.20 = 621,202,492.80/x
  3. Step 3: Cross multiply
    663,669,820.80x = 995,504,731.20 × 621,202,492.80
  4. Step 4: Simplify right side
    663,669,820.80x = 618,410,020,615,633,920
  5. Step 5: Solve for x
    x = 618,410,020,615,633,920/663,669,820.80
  6. Step 6: Final answer
    x = 931,803,739.20

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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.