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Finding the Fourth Proportional to 374,814.34, 517,115.44 and 305,783.52

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Solution

The fourth proportional to 374,814.34, 517,115.44 and 305,783.52 is: 421,876.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,814.34 : 517,115.44 = 305,783.52 : x
  2. Step 2: Convert to fraction form
    374,814.34/517,115.44 = 305,783.52/x
  3. Step 3: Cross multiply
    374,814.34x = 517,115.44 × 305,783.52
  4. Step 4: Simplify right side
    374,814.34x = 158,125,379,489.55
  5. Step 5: Solve for x
    x = 158,125,379,489.55/374,814.34
  6. Step 6: Final answer
    x = 421,876.55

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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.