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Finding the Fourth Proportional to 286,749.32, 395,720.48 and 157,679.61

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Solution

The fourth proportional to 286,749.32, 395,720.48 and 157,679.61 is: 217,601.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,749.32 : 395,720.48 = 157,679.61 : x
  2. Step 2: Convert to fraction form
    286,749.32/395,720.48 = 157,679.61/x
  3. Step 3: Cross multiply
    286,749.32x = 395,720.48 × 157,679.61
  4. Step 4: Simplify right side
    286,749.32x = 62,397,050,955.41
  5. Step 5: Solve for x
    x = 62,397,050,955.41/286,749.32
  6. Step 6: Final answer
    x = 217,601.39

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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.