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Finding the Fourth Proportional to 347,575.57, 479,406.93 and 318,987.56

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Solution

The fourth proportional to 347,575.57, 479,406.93 and 318,987.56 is: 439,975.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,575.57 : 479,406.93 = 318,987.56 : x
  2. Step 2: Convert to fraction form
    347,575.57/479,406.93 = 318,987.56/x
  3. Step 3: Cross multiply
    347,575.57x = 479,406.93 × 318,987.56
  4. Step 4: Simplify right side
    347,575.57x = 152,924,846,847.79
  5. Step 5: Solve for x
    x = 152,924,846,847.79/347,575.57
  6. Step 6: Final answer
    x = 439,975.82

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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.