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Finding the Fourth Proportional to 291,206.60, 436,809.90 and 231,720.20

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Solution

The fourth proportional to 291,206.60, 436,809.90 and 231,720.20 is: 347,580.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,206.60 : 436,809.90 = 231,720.20 : x
  2. Step 2: Convert to fraction form
    291,206.60/436,809.90 = 231,720.20/x
  3. Step 3: Cross multiply
    291,206.60x = 436,809.90 × 231,720.20
  4. Step 4: Simplify right side
    291,206.60x = 101,217,677,389.98
  5. Step 5: Solve for x
    x = 101,217,677,389.98/291,206.60
  6. Step 6: Final answer
    x = 347,580.30

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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.