Home / 320,436,015.20-480,654,022.80-212,730,639.20

Finding the Fourth Proportional to 320,436,015.20, 480,654,022.80 and 212,730,639.20

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Solution

The fourth proportional to 320,436,015.20, 480,654,022.80 and 212,730,639.20 is: 319,095,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,436,015.20 : 480,654,022.80 = 212,730,639.20 : x
  2. Step 2: Convert to fraction form
    320,436,015.20/480,654,022.80 = 212,730,639.20/x
  3. Step 3: Cross multiply
    320,436,015.20x = 480,654,022.80 × 212,730,639.20
  4. Step 4: Simplify right side
    320,436,015.20x = 102,249,837,504,295,376
  5. Step 5: Solve for x
    x = 102,249,837,504,295,376/320,436,015.20
  6. Step 6: Final answer
    x = 319,095,958.80

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1.5x scale

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.