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Finding the Fourth Proportional to 316,528.40, 436,814.40 and 173,286.08

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Solution

The fourth proportional to 316,528.40, 436,814.40 and 173,286.08 is: 239,137.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,528.40 : 436,814.40 = 173,286.08 : x
  2. Step 2: Convert to fraction form
    316,528.40/436,814.40 = 173,286.08/x
  3. Step 3: Cross multiply
    316,528.40x = 436,814.40 × 173,286.08
  4. Step 4: Simplify right side
    316,528.40x = 75,693,855,063.55
  5. Step 5: Solve for x
    x = 75,693,855,063.55/316,528.40
  6. Step 6: Final answer
    x = 239,137.64

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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.