Home / 312,014,920.80-468,022,381.20-221,315,656.80

Finding the Fourth Proportional to 312,014,920.80, 468,022,381.20 and 221,315,656.80

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Solution

The fourth proportional to 312,014,920.80, 468,022,381.20 and 221,315,656.80 is: 331,973,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,014,920.80 : 468,022,381.20 = 221,315,656.80 : x
  2. Step 2: Convert to fraction form
    312,014,920.80/468,022,381.20 = 221,315,656.80/x
  3. Step 3: Cross multiply
    312,014,920.80x = 468,022,381.20 × 221,315,656.80
  4. Step 4: Simplify right side
    312,014,920.80x = 103,580,680,692,377,968
  5. Step 5: Solve for x
    x = 103,580,680,692,377,968/312,014,920.80
  6. Step 6: Final answer
    x = 331,973,485.20

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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.