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Finding the Fourth Proportional to 455,210.69, 628,190.81 and 251,261.67

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Solution

The fourth proportional to 455,210.69, 628,190.81 and 251,261.67 is: 346,741.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,210.69 : 628,190.81 = 251,261.67 : x
  2. Step 2: Convert to fraction form
    455,210.69/628,190.81 = 251,261.67/x
  3. Step 3: Cross multiply
    455,210.69x = 628,190.81 × 251,261.67
  4. Step 4: Simplify right side
    455,210.69x = 157,840,270,742.94
  5. Step 5: Solve for x
    x = 157,840,270,742.94/455,210.69
  6. Step 6: Final answer
    x = 346,741.14

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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.