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Finding the Fourth Proportional to 209,961.20, 314,941.80 and 191,590.40

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Solution

The fourth proportional to 209,961.20, 314,941.80 and 191,590.40 is: 287,385.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,961.20 : 314,941.80 = 191,590.40 : x
  2. Step 2: Convert to fraction form
    209,961.20/314,941.80 = 191,590.40/x
  3. Step 3: Cross multiply
    209,961.20x = 314,941.80 × 191,590.40
  4. Step 4: Simplify right side
    209,961.20x = 60,339,825,438.72
  5. Step 5: Solve for x
    x = 60,339,825,438.72/209,961.20
  6. Step 6: Final answer
    x = 287,385.60

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1.5x scale

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.