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Finding the Fourth Proportional to 310,686.86, 428,743.78 and 174,720.76

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Solution

The fourth proportional to 310,686.86, 428,743.78 and 174,720.76 is: 241,112.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,686.86 : 428,743.78 = 174,720.76 : x
  2. Step 2: Convert to fraction form
    310,686.86/428,743.78 = 174,720.76/x
  3. Step 3: Cross multiply
    310,686.86x = 428,743.78 × 174,720.76
  4. Step 4: Simplify right side
    310,686.86x = 74,910,439,086.87
  5. Step 5: Solve for x
    x = 74,910,439,086.87/310,686.86
  6. Step 6: Final answer
    x = 241,112.35

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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.