Home / 685,384.50-1,028,126.16-212,009.16

Finding the Fourth Proportional to 685,384.50, 1,028,126.16 and 212,009.16

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Solution

The fourth proportional to 685,384.50, 1,028,126.16 and 212,009.16 is: 318,029.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,384.50 : 1,028,126.16 = 212,009.16 : x
  2. Step 2: Convert to fraction form
    685,384.50/1,028,126.16 = 212,009.16/x
  3. Step 3: Cross multiply
    685,384.50x = 1,028,126.16 × 212,009.16
  4. Step 4: Simplify right side
    685,384.50x = 217,972,163,555.63
  5. Step 5: Solve for x
    x = 217,972,163,555.63/685,384.50
  6. Step 6: Final answer
    x = 318,029.02

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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.