Home / 685,999.88-1,024,105.77-640,412.09

Finding the Fourth Proportional to 685,999.88, 1,024,105.77 and 640,412.09

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Solution

The fourth proportional to 685,999.88, 1,024,105.77 and 640,412.09 is: 956,049.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,999.88 : 1,024,105.77 = 640,412.09 : x
  2. Step 2: Convert to fraction form
    685,999.88/1,024,105.77 = 640,412.09/x
  3. Step 3: Cross multiply
    685,999.88x = 1,024,105.77 × 640,412.09
  4. Step 4: Simplify right side
    685,999.88x = 655,849,711,426.23
  5. Step 5: Solve for x
    x = 655,849,711,426.23/685,999.88
  6. Step 6: Final answer
    x = 956,049.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.