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Finding the Fourth Proportional to 805,938,922.40, 1,206,892,844.40 and 644,695,786.40

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Solution

The fourth proportional to 805,938,922.40, 1,206,892,844.40 and 644,695,786.40 is: 965,431,386.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,938,922.40 : 1,206,892,844.40 = 644,695,786.40 : x
  2. Step 2: Convert to fraction form
    805,938,922.40/1,206,892,844.40 = 644,695,786.40/x
  3. Step 3: Cross multiply
    805,938,922.40x = 1,206,892,844.40 × 644,695,786.40
  4. Step 4: Simplify right side
    805,938,922.40x = 778,078,731,420,990,848
  5. Step 5: Solve for x
    x = 778,078,731,420,990,848/805,938,922.40
  6. Step 6: Final answer
    x = 965,431,386.67

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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.