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Finding the Fourth Proportional to 355,824.88, 490,989.84 and 212,554.51

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Solution

The fourth proportional to 355,824.88, 490,989.84 and 212,554.51 is: 293,296.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,824.88 : 490,989.84 = 212,554.51 : x
  2. Step 2: Convert to fraction form
    355,824.88/490,989.84 = 212,554.51/x
  3. Step 3: Cross multiply
    355,824.88x = 490,989.84 × 212,554.51
  4. Step 4: Simplify right side
    355,824.88x = 104,362,102,831.62
  5. Step 5: Solve for x
    x = 104,362,102,831.62/355,824.88
  6. Step 6: Final answer
    x = 293,296.25

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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.