Home / 1,989,165,619.20-2,983,748,428.80-678,632,113.20

Finding the Fourth Proportional to 1,989,165,619.20, 2,983,748,428.80 and 678,632,113.20

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Solution

The fourth proportional to 1,989,165,619.20, 2,983,748,428.80 and 678,632,113.20 is: 1,017,948,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,165,619.20 : 2,983,748,428.80 = 678,632,113.20 : x
  2. Step 2: Convert to fraction form
    1,989,165,619.20/2,983,748,428.80 = 678,632,113.20/x
  3. Step 3: Cross multiply
    1,989,165,619.20x = 2,983,748,428.80 × 678,632,113.20
  4. Step 4: Simplify right side
    1,989,165,619.20x = 2,024,867,501,493,723,904
  5. Step 5: Solve for x
    x = 2,024,867,501,493,723,904/1,989,165,619.20
  6. Step 6: Final answer
    x = 1,017,948,169.80

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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.