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Finding the Fourth Proportional to 316,309.36, 436,505.95 and 171,115.10

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Solution

The fourth proportional to 316,309.36, 436,505.95 and 171,115.10 is: 236,138.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,309.36 : 436,505.95 = 171,115.10 : x
  2. Step 2: Convert to fraction form
    316,309.36/436,505.95 = 171,115.10/x
  3. Step 3: Cross multiply
    316,309.36x = 436,505.95 × 171,115.10
  4. Step 4: Simplify right side
    316,309.36x = 74,692,757,102.32
  5. Step 5: Solve for x
    x = 74,692,757,102.32/316,309.36
  6. Step 6: Final answer
    x = 236,138.31

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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.