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Finding the Fourth Proportional to 455,087.71, 628,016.65 and 251,140.51

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Solution

The fourth proportional to 455,087.71, 628,016.65 and 251,140.51 is: 346,571.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,087.71 : 628,016.65 = 251,140.51 : x
  2. Step 2: Convert to fraction form
    455,087.71/628,016.65 = 251,140.51/x
  3. Step 3: Cross multiply
    455,087.71x = 628,016.65 × 251,140.51
  4. Step 4: Simplify right side
    455,087.71x = 157,720,421,769.49
  5. Step 5: Solve for x
    x = 157,720,421,769.49/455,087.71
  6. Step 6: Final answer
    x = 346,571.48

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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.