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Finding the Fourth Proportional to 354,708.51, 489,426.03 and 225,698.19

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Solution

The fourth proportional to 354,708.51, 489,426.03 and 225,698.19 is: 311,417.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,708.51 : 489,426.03 = 225,698.19 : x
  2. Step 2: Convert to fraction form
    354,708.51/489,426.03 = 225,698.19/x
  3. Step 3: Cross multiply
    354,708.51x = 489,426.03 × 225,698.19
  4. Step 4: Simplify right side
    354,708.51x = 110,462,569,109.89
  5. Step 5: Solve for x
    x = 110,462,569,109.89/354,708.51
  6. Step 6: Final answer
    x = 311,417.87

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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.