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Finding the Fourth Proportional to 291,225.20, 436,254.60 and 166,420.40

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Solution

The fourth proportional to 291,225.20, 436,254.60 and 166,420.40 is: 249,297.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,225.20 : 436,254.60 = 166,420.40 : x
  2. Step 2: Convert to fraction form
    291,225.20/436,254.60 = 166,420.40/x
  3. Step 3: Cross multiply
    291,225.20x = 436,254.60 × 166,420.40
  4. Step 4: Simplify right side
    291,225.20x = 72,601,665,033.84
  5. Step 5: Solve for x
    x = 72,601,665,033.84/291,225.20
  6. Step 6: Final answer
    x = 249,297.33

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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.