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Finding the Fourth Proportional to 252,668.55, 378,801.63 and 145,931.07

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Solution

The fourth proportional to 252,668.55, 378,801.63 and 145,931.07 is: 218,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,668.55 : 378,801.63 = 145,931.07 : x
  2. Step 2: Convert to fraction form
    252,668.55/378,801.63 = 145,931.07/x
  3. Step 3: Cross multiply
    252,668.55x = 378,801.63 × 145,931.07
  4. Step 4: Simplify right side
    252,668.55x = 55,278,927,183.64
  5. Step 5: Solve for x
    x = 55,278,927,183.64/252,668.55
  6. Step 6: Final answer
    x = 218,780.40

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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.