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Finding the Fourth Proportional to 421,358.56, 631,988.61 and 168,628.84

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Solution

The fourth proportional to 421,358.56, 631,988.61 and 168,628.84 is: 252,923.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,358.56 : 631,988.61 = 168,628.84 : x
  2. Step 2: Convert to fraction form
    421,358.56/631,988.61 = 168,628.84/x
  3. Step 3: Cross multiply
    421,358.56x = 631,988.61 × 168,628.84
  4. Step 4: Simplify right side
    421,358.56x = 106,571,506,197.51
  5. Step 5: Solve for x
    x = 106,571,506,197.51/421,358.56
  6. Step 6: Final answer
    x = 252,923.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.