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Finding the Fourth Proportional to 318,379.44, 439,323.76 and 215,238.08

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Solution

The fourth proportional to 318,379.44, 439,323.76 and 215,238.08 is: 297,001.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,379.44 : 439,323.76 = 215,238.08 : x
  2. Step 2: Convert to fraction form
    318,379.44/439,323.76 = 215,238.08/x
  3. Step 3: Cross multiply
    318,379.44x = 439,323.76 × 215,238.08
  4. Step 4: Simplify right side
    318,379.44x = 94,559,202,600.78
  5. Step 5: Solve for x
    x = 94,559,202,600.78/318,379.44
  6. Step 6: Final answer
    x = 297,001.60

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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.