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Finding the Fourth Proportional to 380,409.73, 524,959.00 and 210,640.21

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Solution

The fourth proportional to 380,409.73, 524,959.00 and 210,640.21 is: 290,679.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,409.73 : 524,959.00 = 210,640.21 : x
  2. Step 2: Convert to fraction form
    380,409.73/524,959.00 = 210,640.21/x
  3. Step 3: Cross multiply
    380,409.73x = 524,959.00 × 210,640.21
  4. Step 4: Simplify right side
    380,409.73x = 110,577,472,162.39
  5. Step 5: Solve for x
    x = 110,577,472,162.39/380,409.73
  6. Step 6: Final answer
    x = 290,679.93

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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.