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Finding the Fourth Proportional to 347,505.12, 479,309.79 and 318,917.12

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Solution

The fourth proportional to 347,505.12, 479,309.79 and 318,917.12 is: 439,878.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,505.12 : 479,309.79 = 318,917.12 : x
  2. Step 2: Convert to fraction form
    347,505.12/479,309.79 = 318,917.12/x
  3. Step 3: Cross multiply
    347,505.12x = 479,309.79 × 318,917.12
  4. Step 4: Simplify right side
    347,505.12x = 152,860,097,814.61
  5. Step 5: Solve for x
    x = 152,860,097,814.61/347,505.12
  6. Step 6: Final answer
    x = 439,878.69

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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.