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Finding the Fourth Proportional to 291,055.60, 436,583.40 and 220,196.80

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Solution

The fourth proportional to 291,055.60, 436,583.40 and 220,196.80 is: 330,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,055.60 : 436,583.40 = 220,196.80 : x
  2. Step 2: Convert to fraction form
    291,055.60/436,583.40 = 220,196.80/x
  3. Step 3: Cross multiply
    291,055.60x = 436,583.40 × 220,196.80
  4. Step 4: Simplify right side
    291,055.60x = 96,134,267,613.12
  5. Step 5: Solve for x
    x = 96,134,267,613.12/291,055.60
  6. Step 6: Final answer
    x = 330,295.20

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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.