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Finding the Fourth Proportional to 291,312.80, 436,969.20 and 173,117.60

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Solution

The fourth proportional to 291,312.80, 436,969.20 and 173,117.60 is: 259,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,312.80 : 436,969.20 = 173,117.60 : x
  2. Step 2: Convert to fraction form
    291,312.80/436,969.20 = 173,117.60/x
  3. Step 3: Cross multiply
    291,312.80x = 436,969.20 × 173,117.60
  4. Step 4: Simplify right side
    291,312.80x = 75,647,059,177.92
  5. Step 5: Solve for x
    x = 75,647,059,177.92/291,312.80
  6. Step 6: Final answer
    x = 259,676.40

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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.