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Finding the Fourth Proportional to 620,571,708.80, 930,857,563.20 and 275,158,678.40

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Solution

The fourth proportional to 620,571,708.80, 930,857,563.20 and 275,158,678.40 is: 412,738,017.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,571,708.80 : 930,857,563.20 = 275,158,678.40 : x
  2. Step 2: Convert to fraction form
    620,571,708.80/930,857,563.20 = 275,158,678.40/x
  3. Step 3: Cross multiply
    620,571,708.80x = 930,857,563.20 × 275,158,678.40
  4. Step 4: Simplify right side
    620,571,708.80x = 256,133,536,868,756,480
  5. Step 5: Solve for x
    x = 256,133,536,868,756,480/620,571,708.80
  6. Step 6: Final answer
    x = 412,738,017.60

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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.