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Finding the Fourth Proportional to 310,563.51, 428,593.05 and 189,685.23

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Solution

The fourth proportional to 310,563.51, 428,593.05 and 189,685.23 is: 261,775.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,563.51 : 428,593.05 = 189,685.23 : x
  2. Step 2: Convert to fraction form
    310,563.51/428,593.05 = 189,685.23/x
  3. Step 3: Cross multiply
    310,563.51x = 428,593.05 × 189,685.23
  4. Step 4: Simplify right side
    310,563.51x = 81,297,771,265.65
  5. Step 5: Solve for x
    x = 81,297,771,265.65/310,563.51
  6. Step 6: Final answer
    x = 261,775.03

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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.