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Finding the Fourth Proportional to 395,689.15, 546,061.19 and 242,811.81

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Solution

The fourth proportional to 395,689.15, 546,061.19 and 242,811.81 is: 335,086.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,689.15 : 546,061.19 = 242,811.81 : x
  2. Step 2: Convert to fraction form
    395,689.15/546,061.19 = 242,811.81/x
  3. Step 3: Cross multiply
    395,689.15x = 546,061.19 × 242,811.81
  4. Step 4: Simplify right side
    395,689.15x = 132,590,106,521.68
  5. Step 5: Solve for x
    x = 132,590,106,521.68/395,689.15
  6. Step 6: Final answer
    x = 335,086.54

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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.