Home / 685,281.70-1,028,156.05-205,521.13

Finding the Fourth Proportional to 685,281.70, 1,028,156.05 and 205,521.13

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Solution

The fourth proportional to 685,281.70, 1,028,156.05 and 205,521.13 is: 308,351.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,281.70 : 1,028,156.05 = 205,521.13 : x
  2. Step 2: Convert to fraction form
    685,281.70/1,028,156.05 = 205,521.13/x
  3. Step 3: Cross multiply
    685,281.70x = 1,028,156.05 × 205,521.13
  4. Step 4: Simplify right side
    685,281.70x = 211,307,788,071.56
  5. Step 5: Solve for x
    x = 211,307,788,071.56/685,281.70
  6. Step 6: Final answer
    x = 308,351.72

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Double scale
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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.