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Finding the Fourth Proportional to 316,419.28, 436,656 and 173,178.94

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Solution

The fourth proportional to 316,419.28, 436,656 and 173,178.94 is: 238,985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,419.28 : 436,656 = 173,178.94 : x
  2. Step 2: Convert to fraction form
    316,419.28/436,656 = 173,178.94/x
  3. Step 3: Cross multiply
    316,419.28x = 436,656 × 173,178.94
  4. Step 4: Simplify right side
    316,419.28x = 75,619,623,224.64
  5. Step 5: Solve for x
    x = 75,619,623,224.64/316,419.28
  6. Step 6: Final answer
    x = 238,985.51

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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.