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Finding the Fourth Proportional to 283,878.88, 391,780.47 and 212,134.30

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Solution

The fourth proportional to 283,878.88, 391,780.47 and 212,134.30 is: 292,765.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,878.88 : 391,780.47 = 212,134.30 : x
  2. Step 2: Convert to fraction form
    283,878.88/391,780.47 = 212,134.30/x
  3. Step 3: Cross multiply
    283,878.88x = 391,780.47 × 212,134.30
  4. Step 4: Simplify right side
    283,878.88x = 83,110,075,757.12
  5. Step 5: Solve for x
    x = 83,110,075,757.12/283,878.88
  6. Step 6: Final answer
    x = 292,765.97

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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.