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Finding the Fourth Proportional to 393,357.06, 542,918.70 and 250,089.12

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Solution

The fourth proportional to 393,357.06, 542,918.70 and 250,089.12 is: 345,177.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,357.06 : 542,918.70 = 250,089.12 : x
  2. Step 2: Convert to fraction form
    393,357.06/542,918.70 = 250,089.12/x
  3. Step 3: Cross multiply
    393,357.06x = 542,918.70 × 250,089.12
  4. Step 4: Simplify right side
    393,357.06x = 135,778,059,914.54
  5. Step 5: Solve for x
    x = 135,778,059,914.54/393,357.06
  6. Step 6: Final answer
    x = 345,177.64

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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.