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Finding the Fourth Proportional to 395,688.65, 546,060.50 and 242,811.31

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Solution

The fourth proportional to 395,688.65, 546,060.50 and 242,811.31 is: 335,085.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,688.65 : 546,060.50 = 242,811.31 : x
  2. Step 2: Convert to fraction form
    395,688.65/546,060.50 = 242,811.31/x
  3. Step 3: Cross multiply
    395,688.65x = 546,060.50 × 242,811.31
  4. Step 4: Simplify right side
    395,688.65x = 132,589,665,344.26
  5. Step 5: Solve for x
    x = 132,589,665,344.26/395,688.65
  6. Step 6: Final answer
    x = 335,085.84

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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.