Home / 665,357.36-918,192.25-378,877.45

Finding the Fourth Proportional to 665,357.36, 918,192.25 and 378,877.45

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Solution

The fourth proportional to 665,357.36, 918,192.25 and 378,877.45 is: 522,850.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,357.36 : 918,192.25 = 378,877.45 : x
  2. Step 2: Convert to fraction form
    665,357.36/918,192.25 = 378,877.45/x
  3. Step 3: Cross multiply
    665,357.36x = 918,192.25 × 378,877.45
  4. Step 4: Simplify right side
    665,357.36x = 347,882,333,698.80
  5. Step 5: Solve for x
    x = 347,882,333,698.80/665,357.36
  6. Step 6: Final answer
    x = 522,850.36

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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.