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Finding the Fourth Proportional to 455,775.10, 628,985.20 and 286,102.78

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Solution

The fourth proportional to 455,775.10, 628,985.20 and 286,102.78 is: 394,831.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,775.10 : 628,985.20 = 286,102.78 : x
  2. Step 2: Convert to fraction form
    455,775.10/628,985.20 = 286,102.78/x
  3. Step 3: Cross multiply
    455,775.10x = 628,985.20 × 286,102.78
  4. Step 4: Simplify right side
    455,775.10x = 179,954,414,298.86
  5. Step 5: Solve for x
    x = 179,954,414,298.86/455,775.10
  6. Step 6: Final answer
    x = 394,831.61

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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.