Home / 642,917.04-887,246.55-356,463.78

Finding the Fourth Proportional to 642,917.04, 887,246.55 and 356,463.78

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Solution

The fourth proportional to 642,917.04, 887,246.55 and 356,463.78 is: 491,931.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,917.04 : 887,246.55 = 356,463.78 : x
  2. Step 2: Convert to fraction form
    642,917.04/887,246.55 = 356,463.78/x
  3. Step 3: Cross multiply
    642,917.04x = 887,246.55 × 356,463.78
  4. Step 4: Simplify right side
    642,917.04x = 316,271,259,004.96
  5. Step 5: Solve for x
    x = 316,271,259,004.96/642,917.04
  6. Step 6: Final answer
    x = 491,931.68

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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.