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Finding the Fourth Proportional to 426,774.42, 640,161.63 and 127,465.25

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Solution

The fourth proportional to 426,774.42, 640,161.63 and 127,465.25 is: 191,197.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,774.42 : 640,161.63 = 127,465.25 : x
  2. Step 2: Convert to fraction form
    426,774.42/640,161.63 = 127,465.25/x
  3. Step 3: Cross multiply
    426,774.42x = 640,161.63 × 127,465.25
  4. Step 4: Simplify right side
    426,774.42x = 81,598,359,007.55
  5. Step 5: Solve for x
    x = 81,598,359,007.55/426,774.42
  6. Step 6: Final answer
    x = 191,197.87

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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.