Home / 665,072.76-917,645.58-378,570.36

Finding the Fourth Proportional to 665,072.76, 917,645.58 and 378,570.36

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Solution

The fourth proportional to 665,072.76, 917,645.58 and 378,570.36 is: 522,338.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,072.76 : 917,645.58 = 378,570.36 : x
  2. Step 2: Convert to fraction form
    665,072.76/917,645.58 = 378,570.36/x
  3. Step 3: Cross multiply
    665,072.76x = 917,645.58 × 378,570.36
  4. Step 4: Simplify right side
    665,072.76x = 347,393,417,573.01
  5. Step 5: Solve for x
    x = 347,393,417,573.01/665,072.76
  6. Step 6: Final answer
    x = 522,338.97

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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.