Home / 685,980.30-1,029,009.34-212,732.94

Finding the Fourth Proportional to 685,980.30, 1,029,009.34 and 212,732.94

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Solution

The fourth proportional to 685,980.30, 1,029,009.34 and 212,732.94 is: 319,111.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,980.30 : 1,029,009.34 = 212,732.94 : x
  2. Step 2: Convert to fraction form
    685,980.30/1,029,009.34 = 212,732.94/x
  3. Step 3: Cross multiply
    685,980.30x = 1,029,009.34 × 212,732.94
  4. Step 4: Simplify right side
    685,980.30x = 218,904,182,185.66
  5. Step 5: Solve for x
    x = 218,904,182,185.66/685,980.30
  6. Step 6: Final answer
    x = 319,111.47

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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.