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Finding the Fourth Proportional to 308,417.28, 425,811.84 and 236,661.12

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Solution

The fourth proportional to 308,417.28, 425,811.84 and 236,661.12 is: 326,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,417.28 : 425,811.84 = 236,661.12 : x
  2. Step 2: Convert to fraction form
    308,417.28/425,811.84 = 236,661.12/x
  3. Step 3: Cross multiply
    308,417.28x = 425,811.84 × 236,661.12
  4. Step 4: Simplify right side
    308,417.28x = 100,773,106,963.66
  5. Step 5: Solve for x
    x = 100,773,106,963.66/308,417.28
  6. Step 6: Final answer
    x = 326,742.74

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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.