Home / 312,013,312.80-468,019,969.20-221,314,048.80

Finding the Fourth Proportional to 312,013,312.80, 468,019,969.20 and 221,314,048.80

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Solution

The fourth proportional to 312,013,312.80, 468,019,969.20 and 221,314,048.80 is: 331,971,073.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,013,312.80 : 468,019,969.20 = 221,314,048.80 : x
  2. Step 2: Convert to fraction form
    312,013,312.80/468,019,969.20 = 221,314,048.80/x
  3. Step 3: Cross multiply
    312,013,312.80x = 468,019,969.20 × 221,314,048.80
  4. Step 4: Simplify right side
    312,013,312.80x = 103,579,394,302,903,296
  5. Step 5: Solve for x
    x = 103,579,394,302,903,296/312,013,312.80
  6. Step 6: Final answer
    x = 331,971,073.20

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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.