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Finding the Fourth Proportional to 400,390.54, 552,538.99 and 219,102.51

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Solution

The fourth proportional to 400,390.54, 552,538.99 and 219,102.51 is: 302,361.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,390.54 : 552,538.99 = 219,102.51 : x
  2. Step 2: Convert to fraction form
    400,390.54/552,538.99 = 219,102.51/x
  3. Step 3: Cross multiply
    400,390.54x = 552,538.99 × 219,102.51
  4. Step 4: Simplify right side
    400,390.54x = 121,062,675,723.66
  5. Step 5: Solve for x
    x = 121,062,675,723.66/400,390.54
  6. Step 6: Final answer
    x = 302,361.48

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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.