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Finding the Fourth Proportional to 291,249.80, 435,999.90 and 172,860.20

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Solution

The fourth proportional to 291,249.80, 435,999.90 and 172,860.20 is: 258,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,249.80 : 435,999.90 = 172,860.20 : x
  2. Step 2: Convert to fraction form
    291,249.80/435,999.90 = 172,860.20/x
  3. Step 3: Cross multiply
    291,249.80x = 435,999.90 × 172,860.20
  4. Step 4: Simplify right side
    291,249.80x = 75,367,029,913.98
  5. Step 5: Solve for x
    x = 75,367,029,913.98/291,249.80
  6. Step 6: Final answer
    x = 258,771.10

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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.