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Finding the Fourth Proportional to 291,379.40, 436,829.10 and 131,465.80

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Solution

The fourth proportional to 291,379.40, 436,829.10 and 131,465.80 is: 197,090.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,379.40 : 436,829.10 = 131,465.80 : x
  2. Step 2: Convert to fraction form
    291,379.40/436,829.10 = 131,465.80/x
  3. Step 3: Cross multiply
    291,379.40x = 436,829.10 × 131,465.80
  4. Step 4: Simplify right side
    291,379.40x = 57,428,087,094.78
  5. Step 5: Solve for x
    x = 57,428,087,094.78/291,379.40
  6. Step 6: Final answer
    x = 197,090.42

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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.