Home / 685,124.10-1,027,686.15-211,857.30

Finding the Fourth Proportional to 685,124.10, 1,027,686.15 and 211,857.30

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Solution

The fourth proportional to 685,124.10, 1,027,686.15 and 211,857.30 is: 317,785.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,124.10 : 1,027,686.15 = 211,857.30 : x
  2. Step 2: Convert to fraction form
    685,124.10/1,027,686.15 = 211,857.30/x
  3. Step 3: Cross multiply
    685,124.10x = 1,027,686.15 × 211,857.30
  4. Step 4: Simplify right side
    685,124.10x = 217,722,812,986.40
  5. Step 5: Solve for x
    x = 217,722,812,986.40/685,124.10
  6. Step 6: Final answer
    x = 317,785.95

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Double scale
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Similar ratio
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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.