Home / 685,281.32-1,028,155.49-205,520.75

Finding the Fourth Proportional to 685,281.32, 1,028,155.49 and 205,520.75

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Solution

The fourth proportional to 685,281.32, 1,028,155.49 and 205,520.75 is: 308,351.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,281.32 : 1,028,155.49 = 205,520.75 : x
  2. Step 2: Convert to fraction form
    685,281.32/1,028,155.49 = 205,520.75/x
  3. Step 3: Cross multiply
    685,281.32x = 1,028,155.49 × 205,520.75
  4. Step 4: Simplify right side
    685,281.32x = 211,307,287,421.42
  5. Step 5: Solve for x
    x = 211,307,287,421.42/685,281.32
  6. Step 6: Final answer
    x = 308,351.16

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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.