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Finding the Fourth Proportional to 231,780.80, 346,990.80 and 172,877.60

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Solution

The fourth proportional to 231,780.80, 346,990.80 and 172,877.60 is: 258,808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,780.80 : 346,990.80 = 172,877.60 : x
  2. Step 2: Convert to fraction form
    231,780.80/346,990.80 = 172,877.60/x
  3. Step 3: Cross multiply
    231,780.80x = 346,990.80 × 172,877.60
  4. Step 4: Simplify right side
    231,780.80x = 59,986,936,726.08
  5. Step 5: Solve for x
    x = 59,986,936,726.08/231,780.80
  6. Step 6: Final answer
    x = 258,808.91

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1.5x scale

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.