Home / 211,981.12-317,279.40-155,806.36

Finding the Fourth Proportional to 211,981.12, 317,279.40 and 155,806.36

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Solution

The fourth proportional to 211,981.12, 317,279.40 and 155,806.36 is: 233,200.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,981.12 : 317,279.40 = 155,806.36 : x
  2. Step 2: Convert to fraction form
    211,981.12/317,279.40 = 155,806.36/x
  3. Step 3: Cross multiply
    211,981.12x = 317,279.40 × 155,806.36
  4. Step 4: Simplify right side
    211,981.12x = 49,434,148,416.98
  5. Step 5: Solve for x
    x = 49,434,148,416.98/211,981.12
  6. Step 6: Final answer
    x = 233,200.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.