Home / 685,143-1,027,812.51-211,864.86

Finding the Fourth Proportional to 685,143, 1,027,812.51 and 211,864.86

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Solution

The fourth proportional to 685,143, 1,027,812.51 and 211,864.86 is: 317,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,143 : 1,027,812.51 = 211,864.86 : x
  2. Step 2: Convert to fraction form
    685,143/1,027,812.51 = 211,864.86/x
  3. Step 3: Cross multiply
    685,143x = 1,027,812.51 × 211,864.86
  4. Step 4: Simplify right side
    685,143x = 217,757,353,537.40
  5. Step 5: Solve for x
    x = 217,757,353,537.40/685,143
  6. Step 6: Final answer
    x = 317,827.60

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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.