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Finding the Fourth Proportional to 257,293.87, 385,831.45 and 105,386.22

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Solution

The fourth proportional to 257,293.87, 385,831.45 and 105,386.22 is: 158,034.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,293.87 : 385,831.45 = 105,386.22 : x
  2. Step 2: Convert to fraction form
    257,293.87/385,831.45 = 105,386.22/x
  3. Step 3: Cross multiply
    257,293.87x = 385,831.45 × 105,386.22
  4. Step 4: Simplify right side
    257,293.87x = 40,661,318,072.62
  5. Step 5: Solve for x
    x = 40,661,318,072.62/257,293.87
  6. Step 6: Final answer
    x = 158,034.54

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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.