Home / 209,421.17-311,763.15-208,175.61

Finding the Fourth Proportional to 209,421.17, 311,763.15 and 208,175.61

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Solution

The fourth proportional to 209,421.17, 311,763.15 and 208,175.61 is: 309,908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,421.17 : 311,763.15 = 208,175.61 : x
  2. Step 2: Convert to fraction form
    209,421.17/311,763.15 = 208,175.61/x
  3. Step 3: Cross multiply
    209,421.17x = 311,763.15 × 208,175.61
  4. Step 4: Simplify right side
    209,421.17x = 64,901,483,926.77
  5. Step 5: Solve for x
    x = 64,901,483,926.77/209,421.17
  6. Step 6: Final answer
    x = 309,908.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.