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Finding the Fourth Proportional to 312,649.60, 431,464.48 and 191,857.62

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Solution

The fourth proportional to 312,649.60, 431,464.48 and 191,857.62 is: 264,768.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,649.60 : 431,464.48 = 191,857.62 : x
  2. Step 2: Convert to fraction form
    312,649.60/431,464.48 = 191,857.62/x
  3. Step 3: Cross multiply
    312,649.60x = 431,464.48 × 191,857.62
  4. Step 4: Simplify right side
    312,649.60x = 82,779,748,247.34
  5. Step 5: Solve for x
    x = 82,779,748,247.34/312,649.60
  6. Step 6: Final answer
    x = 264,768.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.