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Finding the Fourth Proportional to 278,990.58, 385,009.73 and 151,668.91

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Solution

The fourth proportional to 278,990.58, 385,009.73 and 151,668.91 is: 209,304.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,990.58 : 385,009.73 = 151,668.91 : x
  2. Step 2: Convert to fraction form
    278,990.58/385,009.73 = 151,668.91/x
  3. Step 3: Cross multiply
    278,990.58x = 385,009.73 × 151,668.91
  4. Step 4: Simplify right side
    278,990.58x = 58,394,004,641.06
  5. Step 5: Solve for x
    x = 58,394,004,641.06/278,990.58
  6. Step 6: Final answer
    x = 209,304.58

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1.5x scale

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.