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Finding the Fourth Proportional to 331,661.64, 457,766.88 and 210,779.40

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Solution

The fourth proportional to 331,661.64, 457,766.88 and 210,779.40 is: 290,922.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,661.64 : 457,766.88 = 210,779.40 : x
  2. Step 2: Convert to fraction form
    331,661.64/457,766.88 = 210,779.40/x
  3. Step 3: Cross multiply
    331,661.64x = 457,766.88 × 210,779.40
  4. Step 4: Simplify right side
    331,661.64x = 96,487,828,306.27
  5. Step 5: Solve for x
    x = 96,487,828,306.27/331,661.64
  6. Step 6: Final answer
    x = 290,922.48

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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.