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Finding the Fourth Proportional to 455,295.21, 628,275.12 and 251,313.39

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Solution

The fourth proportional to 455,295.21, 628,275.12 and 251,313.39 is: 346,794.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,295.21 : 628,275.12 = 251,313.39 : x
  2. Step 2: Convert to fraction form
    455,295.21/628,275.12 = 251,313.39/x
  3. Step 3: Cross multiply
    455,295.21x = 628,275.12 × 251,313.39
  4. Step 4: Simplify right side
    455,295.21x = 157,893,950,259.86
  5. Step 5: Solve for x
    x = 157,893,950,259.86/455,295.21
  6. Step 6: Final answer
    x = 346,794.67

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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.