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Finding the Fourth Proportional to 316,637.64, 436,939.92 and 173,399.40

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Solution

The fourth proportional to 316,637.64, 436,939.92 and 173,399.40 is: 239,280.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,637.64 : 436,939.92 = 173,399.40 : x
  2. Step 2: Convert to fraction form
    316,637.64/436,939.92 = 173,399.40/x
  3. Step 3: Cross multiply
    316,637.64x = 436,939.92 × 173,399.40
  4. Step 4: Simplify right side
    316,637.64x = 75,765,119,964.05
  5. Step 5: Solve for x
    x = 75,765,119,964.05/316,637.64
  6. Step 6: Final answer
    x = 239,280.21

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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.