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Finding the Fourth Proportional to 455,720.99, 628,948.40 and 274,524.39

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Solution

The fourth proportional to 455,720.99, 628,948.40 and 274,524.39 is: 378,875.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,720.99 : 628,948.40 = 274,524.39 : x
  2. Step 2: Convert to fraction form
    455,720.99/628,948.40 = 274,524.39/x
  3. Step 3: Cross multiply
    455,720.99x = 628,948.40 × 274,524.39
  4. Step 4: Simplify right side
    455,720.99x = 172,661,674,478.85
  5. Step 5: Solve for x
    x = 172,661,674,478.85/455,720.99
  6. Step 6: Final answer
    x = 378,875.85

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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.