Home / 823,740,638.40-1,235,011,875.12-386,816,179.68

Finding the Fourth Proportional to 823,740,638.40, 1,235,011,875.12 and 386,816,179.68

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Solution

The fourth proportional to 823,740,638.40, 1,235,011,875.12 and 386,816,179.68 is: 579,942,949.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,740,638.40 : 1,235,011,875.12 = 386,816,179.68 : x
  2. Step 2: Convert to fraction form
    823,740,638.40/1,235,011,875.12 = 386,816,179.68/x
  3. Step 3: Cross multiply
    823,740,638.40x = 1,235,011,875.12 × 386,816,179.68
  4. Step 4: Simplify right side
    823,740,638.40x = 477,722,575,393,351,616
  5. Step 5: Solve for x
    x = 477,722,575,393,351,616/823,740,638.40
  6. Step 6: Final answer
    x = 579,942,949.42

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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.