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Finding the Fourth Proportional to 664,302,430.40, 996,453,645.60 and 660,476,055.20

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Solution

The fourth proportional to 664,302,430.40, 996,453,645.60 and 660,476,055.20 is: 990,714,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,302,430.40 : 996,453,645.60 = 660,476,055.20 : x
  2. Step 2: Convert to fraction form
    664,302,430.40/996,453,645.60 = 660,476,055.20/x
  3. Step 3: Cross multiply
    664,302,430.40x = 996,453,645.60 × 660,476,055.20
  4. Step 4: Simplify right side
    664,302,430.40x = 658,133,773,035,546,880
  5. Step 5: Solve for x
    x = 658,133,773,035,546,880/664,302,430.40
  6. Step 6: Final answer
    x = 990,714,082.80

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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.