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Finding the Fourth Proportional to 1,868,648,018.94, 2,803,250,742.84 and 688,137,729.12

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Solution

The fourth proportional to 1,868,648,018.94, 2,803,250,742.84 and 688,137,729.12 is: 1,032,309,231.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868,648,018.94 : 2,803,250,742.84 = 688,137,729.12 : x
  2. Step 2: Convert to fraction form
    1,868,648,018.94/2,803,250,742.84 = 688,137,729.12/x
  3. Step 3: Cross multiply
    1,868,648,018.94x = 2,803,250,742.84 × 688,137,729.12
  4. Step 4: Simplify right side
    1,868,648,018.94x = 1,929,022,600,331,870,720
  5. Step 5: Solve for x
    x = 1,929,022,600,331,870,720/1,868,648,018.94
  6. Step 6: Final answer
    x = 1,032,309,231.48

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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.