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Finding the Fourth Proportional to 316,532.88, 436,728.60 and 203,421.24

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Solution

The fourth proportional to 316,532.88, 436,728.60 and 203,421.24 is: 280,665.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,532.88 : 436,728.60 = 203,421.24 : x
  2. Step 2: Convert to fraction form
    316,532.88/436,728.60 = 203,421.24/x
  3. Step 3: Cross multiply
    316,532.88x = 436,728.60 × 203,421.24
  4. Step 4: Simplify right side
    316,532.88x = 88,839,873,355.46
  5. Step 5: Solve for x
    x = 88,839,873,355.46/316,532.88
  6. Step 6: Final answer
    x = 280,665.55

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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.