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Finding the Fourth Proportional to 283,877.88, 391,779.09 and 212,133.30

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Solution

The fourth proportional to 283,877.88, 391,779.09 and 212,133.30 is: 292,764.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,877.88 : 391,779.09 = 212,133.30 : x
  2. Step 2: Convert to fraction form
    283,877.88/391,779.09 = 212,133.30/x
  3. Step 3: Cross multiply
    283,877.88x = 391,779.09 × 212,133.30
  4. Step 4: Simplify right side
    283,877.88x = 83,109,391,232.70
  5. Step 5: Solve for x
    x = 83,109,391,232.70/283,877.88
  6. Step 6: Final answer
    x = 292,764.59

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1.5x scale

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.