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Finding the Fourth Proportional to 953,855,998.40, 1,430,783,997.60 and 947,809,380.80

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Solution

The fourth proportional to 953,855,998.40, 1,430,783,997.60 and 947,809,380.80 is: 1,421,714,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    953,855,998.40 : 1,430,783,997.60 = 947,809,380.80 : x
  2. Step 2: Convert to fraction form
    953,855,998.40/1,430,783,997.60 = 947,809,380.80/x
  3. Step 3: Cross multiply
    953,855,998.40x = 1,430,783,997.60 × 947,809,380.80
  4. Step 4: Simplify right side
    953,855,998.40x = 1,356,110,494,823,804,416
  5. Step 5: Solve for x
    x = 1,356,110,494,823,804,416/953,855,998.40
  6. Step 6: Final answer
    x = 1,421,714,071.20

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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.