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Finding the Fourth Proportional to 423,570.60, 635,434.61 and 139,277.07

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Solution

The fourth proportional to 423,570.60, 635,434.61 and 139,277.07 is: 208,941.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,570.60 : 635,434.61 = 139,277.07 : x
  2. Step 2: Convert to fraction form
    423,570.60/635,434.61 = 139,277.07/x
  3. Step 3: Cross multiply
    423,570.60x = 635,434.61 × 139,277.07
  4. Step 4: Simplify right side
    423,570.60x = 88,501,469,961.01
  5. Step 5: Solve for x
    x = 88,501,469,961.01/423,570.60
  6. Step 6: Final answer
    x = 208,941.48

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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.