Home / 209,421.41-311,763.52-208,175.86

Finding the Fourth Proportional to 209,421.41, 311,763.52 and 208,175.86

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Solution

The fourth proportional to 209,421.41, 311,763.52 and 208,175.86 is: 309,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,421.41 : 311,763.52 = 208,175.86 : x
  2. Step 2: Convert to fraction form
    209,421.41/311,763.52 = 208,175.86/x
  3. Step 3: Cross multiply
    209,421.41x = 311,763.52 × 208,175.86
  4. Step 4: Simplify right side
    209,421.41x = 64,901,638,892.63
  5. Step 5: Solve for x
    x = 64,901,638,892.63/209,421.41
  6. Step 6: Final answer
    x = 309,909.28

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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.