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Finding the Fourth Proportional to 311,337.81, 429,678.54 and 190,559.52

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Solution

The fourth proportional to 311,337.81, 429,678.54 and 190,559.52 is: 262,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,337.81 : 429,678.54 = 190,559.52 : x
  2. Step 2: Convert to fraction form
    311,337.81/429,678.54 = 190,559.52/x
  3. Step 3: Cross multiply
    311,337.81x = 429,678.54 × 190,559.52
  4. Step 4: Simplify right side
    311,337.81x = 81,879,336,336.70
  5. Step 5: Solve for x
    x = 81,879,336,336.70/311,337.81
  6. Step 6: Final answer
    x = 262,991.95

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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.