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Finding the Fourth Proportional to 316.15, 436.32 and 183.40

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Solution

The fourth proportional to 316.15, 436.32 and 183.40 is: 253.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.15 : 436.32 = 183.40 : x
  2. Step 2: Convert to fraction form
    316.15/436.32 = 183.40/x
  3. Step 3: Cross multiply
    316.15x = 436.32 × 183.40
  4. Step 4: Simplify right side
    316.15x = 80,017.99
  5. Step 5: Solve for x
    x = 80,017.99/316.15
  6. Step 6: Final answer
    x = 253.11

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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.