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Finding the Fourth Proportional to 357,353.36, 493,378.42 and 221,532.46

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Solution

The fourth proportional to 357,353.36, 493,378.42 and 221,532.46 is: 305,857.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,353.36 : 493,378.42 = 221,532.46 : x
  2. Step 2: Convert to fraction form
    357,353.36/493,378.42 = 221,532.46/x
  3. Step 3: Cross multiply
    357,353.36x = 493,378.42 × 221,532.46
  4. Step 4: Simplify right side
    357,353.36x = 109,299,335,093.51
  5. Step 5: Solve for x
    x = 109,299,335,093.51/357,353.36
  6. Step 6: Final answer
    x = 305,857.86

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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.