Home / 312,012,142.80-468,018,214.20-221,312,878.80

Finding the Fourth Proportional to 312,012,142.80, 468,018,214.20 and 221,312,878.80

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Solution

The fourth proportional to 312,012,142.80, 468,018,214.20 and 221,312,878.80 is: 331,969,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,012,142.80 : 468,018,214.20 = 221,312,878.80 : x
  2. Step 2: Convert to fraction form
    312,012,142.80/468,018,214.20 = 221,312,878.80/x
  3. Step 3: Cross multiply
    312,012,142.80x = 468,018,214.20 × 221,312,878.80
  4. Step 4: Simplify right side
    312,012,142.80x = 103,578,458,315,437,040
  5. Step 5: Solve for x
    x = 103,578,458,315,437,040/312,012,142.80
  6. Step 6: Final answer
    x = 331,969,318.20

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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.