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Finding the Fourth Proportional to 316,364.70, 436,583.28 and 173,124.79

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Solution

The fourth proportional to 316,364.70, 436,583.28 and 173,124.79 is: 238,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,364.70 : 436,583.28 = 173,124.79 : x
  2. Step 2: Convert to fraction form
    316,364.70/436,583.28 = 173,124.79/x
  3. Step 3: Cross multiply
    316,364.70x = 436,583.28 × 173,124.79
  4. Step 4: Simplify right side
    316,364.70x = 75,583,388,667.51
  5. Step 5: Solve for x
    x = 75,583,388,667.51/316,364.70
  6. Step 6: Final answer
    x = 238,912.21

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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.