Home / 689,971.36-952,156.56-388,167.84

Finding the Fourth Proportional to 689,971.36, 952,156.56 and 388,167.84

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Solution

The fourth proportional to 689,971.36, 952,156.56 and 388,167.84 is: 535,669.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,971.36 : 952,156.56 = 388,167.84 : x
  2. Step 2: Convert to fraction form
    689,971.36/952,156.56 = 388,167.84/x
  3. Step 3: Cross multiply
    689,971.36x = 952,156.56 × 388,167.84
  4. Step 4: Simplify right side
    689,971.36x = 369,596,555,237.03
  5. Step 5: Solve for x
    x = 369,596,555,237.03/689,971.36
  6. Step 6: Final answer
    x = 535,669.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.