Home / 857,830.20-1,287,057.30-296,921.40

Finding the Fourth Proportional to 857,830.20, 1,287,057.30 and 296,921.40

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Solution

The fourth proportional to 857,830.20, 1,287,057.30 and 296,921.40 is: 445,490.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,830.20 : 1,287,057.30 = 296,921.40 : x
  2. Step 2: Convert to fraction form
    857,830.20/1,287,057.30 = 296,921.40/x
  3. Step 3: Cross multiply
    857,830.20x = 1,287,057.30 × 296,921.40
  4. Step 4: Simplify right side
    857,830.20x = 382,154,855,396.22
  5. Step 5: Solve for x
    x = 382,154,855,396.22/857,830.20
  6. Step 6: Final answer
    x = 445,490.09

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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.