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Finding the Fourth Proportional to 291,700.40, 436,384.20 and 252,690.80

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Solution

The fourth proportional to 291,700.40, 436,384.20 and 252,690.80 is: 378,025.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,700.40 : 436,384.20 = 252,690.80 : x
  2. Step 2: Convert to fraction form
    291,700.40/436,384.20 = 252,690.80/x
  3. Step 3: Cross multiply
    291,700.40x = 436,384.20 × 252,690.80
  4. Step 4: Simplify right side
    291,700.40x = 110,270,272,605.36
  5. Step 5: Solve for x
    x = 110,270,272,605.36/291,700.40
  6. Step 6: Final answer
    x = 378,025.78

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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.