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Finding the Fourth Proportional to 552,742.68, 762,723.09 and 311,020.32

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Solution

The fourth proportional to 552,742.68, 762,723.09 and 311,020.32 is: 429,173.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,742.68 : 762,723.09 = 311,020.32 : x
  2. Step 2: Convert to fraction form
    552,742.68/762,723.09 = 311,020.32/x
  3. Step 3: Cross multiply
    552,742.68x = 762,723.09 × 311,020.32
  4. Step 4: Simplify right side
    552,742.68x = 237,222,379,523.19
  5. Step 5: Solve for x
    x = 237,222,379,523.19/552,742.68
  6. Step 6: Final answer
    x = 429,173.26

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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.