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Finding the Fourth Proportional to 275,643.99, 380,384.10 and 154,785.51

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Solution

The fourth proportional to 275,643.99, 380,384.10 and 154,785.51 is: 213,601.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,643.99 : 380,384.10 = 154,785.51 : x
  2. Step 2: Convert to fraction form
    275,643.99/380,384.10 = 154,785.51/x
  3. Step 3: Cross multiply
    275,643.99x = 380,384.10 × 154,785.51
  4. Step 4: Simplify right side
    275,643.99x = 58,877,946,914.39
  5. Step 5: Solve for x
    x = 58,877,946,914.39/275,643.99
  6. Step 6: Final answer
    x = 213,601.42

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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.