Home / 1,297,428.20-1,946,328.30-398,945.40

Finding the Fourth Proportional to 1,297,428.20, 1,946,328.30 and 398,945.40

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Solution

The fourth proportional to 1,297,428.20, 1,946,328.30 and 398,945.40 is: 598,475.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,428.20 : 1,946,328.30 = 398,945.40 : x
  2. Step 2: Convert to fraction form
    1,297,428.20/1,946,328.30 = 398,945.40/x
  3. Step 3: Cross multiply
    1,297,428.20x = 1,946,328.30 × 398,945.40
  4. Step 4: Simplify right side
    1,297,428.20x = 776,478,722,174.82
  5. Step 5: Solve for x
    x = 776,478,722,174.82/1,297,428.20
  6. Step 6: Final answer
    x = 598,475.29

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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.