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Finding the Fourth Proportional to 309,361.12, 426,923.38 and 173,425.30

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Solution

The fourth proportional to 309,361.12, 426,923.38 and 173,425.30 is: 239,329.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,361.12 : 426,923.38 = 173,425.30 : x
  2. Step 2: Convert to fraction form
    309,361.12/426,923.38 = 173,425.30/x
  3. Step 3: Cross multiply
    309,361.12x = 426,923.38 × 173,425.30
  4. Step 4: Simplify right side
    309,361.12x = 74,039,315,253.51
  5. Step 5: Solve for x
    x = 74,039,315,253.51/309,361.12
  6. Step 6: Final answer
    x = 239,329.74

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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.