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Finding the Fourth Proportional to 318,128.46, 439,018.20 and 182,164.47

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Solution

The fourth proportional to 318,128.46, 439,018.20 and 182,164.47 is: 251,387.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,128.46 : 439,018.20 = 182,164.47 : x
  2. Step 2: Convert to fraction form
    318,128.46/439,018.20 = 182,164.47/x
  3. Step 3: Cross multiply
    318,128.46x = 439,018.20 × 182,164.47
  4. Step 4: Simplify right side
    318,128.46x = 79,973,517,723.35
  5. Step 5: Solve for x
    x = 79,973,517,723.35/318,128.46
  6. Step 6: Final answer
    x = 251,387.50

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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.