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Finding the Fourth Proportional to 309,661.70, 426,839.28 and 233,065.64

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Solution

The fourth proportional to 309,661.70, 426,839.28 and 233,065.64 is: 321,258.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,661.70 : 426,839.28 = 233,065.64 : x
  2. Step 2: Convert to fraction form
    309,661.70/426,839.28 = 233,065.64/x
  3. Step 3: Cross multiply
    309,661.70x = 426,839.28 × 233,065.64
  4. Step 4: Simplify right side
    309,661.70x = 99,481,569,970.34
  5. Step 5: Solve for x
    x = 99,481,569,970.34/309,661.70
  6. Step 6: Final answer
    x = 321,258.88

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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.