Home / 685,087.80-1,028,555.10-401,069.40

Finding the Fourth Proportional to 685,087.80, 1,028,555.10 and 401,069.40

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Solution

The fourth proportional to 685,087.80, 1,028,555.10 and 401,069.40 is: 602,144.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,087.80 : 1,028,555.10 = 401,069.40 : x
  2. Step 2: Convert to fraction form
    685,087.80/1,028,555.10 = 401,069.40/x
  3. Step 3: Cross multiply
    685,087.80x = 1,028,555.10 × 401,069.40
  4. Step 4: Simplify right side
    685,087.80x = 412,521,976,823.94
  5. Step 5: Solve for x
    x = 412,521,976,823.94/685,087.80
  6. Step 6: Final answer
    x = 602,144.68

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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.