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Finding the Fourth Proportional to 455,711.42, 628,879.73 and 251,762.38

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Solution

The fourth proportional to 455,711.42, 628,879.73 and 251,762.38 is: 347,430.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,711.42 : 628,879.73 = 251,762.38 : x
  2. Step 2: Convert to fraction form
    455,711.42/628,879.73 = 251,762.38/x
  3. Step 3: Cross multiply
    455,711.42x = 628,879.73 × 251,762.38
  4. Step 4: Simplify right side
    455,711.42x = 158,328,254,727.55
  5. Step 5: Solve for x
    x = 158,328,254,727.55/455,711.42
  6. Step 6: Final answer
    x = 347,430.96

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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.