Home / 393,669,856.70-590,504,785.05-212,271,328.70

Finding the Fourth Proportional to 393,669,856.70, 590,504,785.05 and 212,271,328.70

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Solution

The fourth proportional to 393,669,856.70, 590,504,785.05 and 212,271,328.70 is: 318,406,993.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,669,856.70 : 590,504,785.05 = 212,271,328.70 : x
  2. Step 2: Convert to fraction form
    393,669,856.70/590,504,785.05 = 212,271,328.70/x
  3. Step 3: Cross multiply
    393,669,856.70x = 590,504,785.05 × 212,271,328.70
  4. Step 4: Simplify right side
    393,669,856.70x = 125,347,235,326,271,376
  5. Step 5: Solve for x
    x = 125,347,235,326,271,376/393,669,856.70
  6. Step 6: Final answer
    x = 318,406,993.05

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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.