Home / 685,423.71-1,028,173.83-212,072.16

Finding the Fourth Proportional to 685,423.71, 1,028,173.83 and 212,072.16

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Solution

The fourth proportional to 685,423.71, 1,028,173.83 and 212,072.16 is: 318,120.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,423.71 : 1,028,173.83 = 212,072.16 : x
  2. Step 2: Convert to fraction form
    685,423.71/1,028,173.83 = 212,072.16/x
  3. Step 3: Cross multiply
    685,423.71x = 1,028,173.83 × 212,072.16
  4. Step 4: Simplify right side
    685,423.71x = 218,047,044,983.57
  5. Step 5: Solve for x
    x = 218,047,044,983.57/685,423.71
  6. Step 6: Final answer
    x = 318,120.08

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Double scale
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Similar ratio
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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.