Home / 642,790.96-887,037.40-356,308.56

Finding the Fourth Proportional to 642,790.96, 887,037.40 and 356,308.56

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Solution

The fourth proportional to 642,790.96, 887,037.40 and 356,308.56 is: 491,697.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,790.96 : 887,037.40 = 356,308.56 : x
  2. Step 2: Convert to fraction form
    642,790.96/887,037.40 = 356,308.56/x
  3. Step 3: Cross multiply
    642,790.96x = 887,037.40 × 356,308.56
  4. Step 4: Simplify right side
    642,790.96x = 316,059,018,660.14
  5. Step 5: Solve for x
    x = 316,059,018,660.14/642,790.96
  6. Step 6: Final answer
    x = 491,697.98

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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.