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Finding the Fourth Proportional to 426,962.73, 640,431.95 and 127,445.79

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Solution

The fourth proportional to 426,962.73, 640,431.95 and 127,445.79 is: 191,165.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,962.73 : 640,431.95 = 127,445.79 : x
  2. Step 2: Convert to fraction form
    426,962.73/640,431.95 = 127,445.79/x
  3. Step 3: Cross multiply
    426,962.73x = 640,431.95 × 127,445.79
  4. Step 4: Simplify right side
    426,962.73x = 81,620,355,808.99
  5. Step 5: Solve for x
    x = 81,620,355,808.99/426,962.73
  6. Step 6: Final answer
    x = 191,165.06

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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.