Home / 429,811.55-643,831.32-251,778.86

Finding the Fourth Proportional to 429,811.55, 643,831.32 and 251,778.86

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Solution

The fourth proportional to 429,811.55, 643,831.32 and 251,778.86 is: 377,149.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,811.55 : 643,831.32 = 251,778.86 : x
  2. Step 2: Convert to fraction form
    429,811.55/643,831.32 = 251,778.86/x
  3. Step 3: Cross multiply
    429,811.55x = 643,831.32 × 251,778.86
  4. Step 4: Simplify right side
    429,811.55x = 162,103,115,781.90
  5. Step 5: Solve for x
    x = 162,103,115,781.90/429,811.55
  6. Step 6: Final answer
    x = 377,149.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.