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Finding the Fourth Proportional to 479,784.56, 661,225.56 and 318,354.80

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Solution

The fourth proportional to 479,784.56, 661,225.56 and 318,354.80 is: 438,747.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,784.56 : 661,225.56 = 318,354.80 : x
  2. Step 2: Convert to fraction form
    479,784.56/661,225.56 = 318,354.80/x
  3. Step 3: Cross multiply
    479,784.56x = 661,225.56 × 318,354.80
  4. Step 4: Simplify right side
    479,784.56x = 210,504,330,908.69
  5. Step 5: Solve for x
    x = 210,504,330,908.69/479,784.56
  6. Step 6: Final answer
    x = 438,747.61

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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.