Home / 642,767.20-887,027.55-352,406.09

Finding the Fourth Proportional to 642,767.20, 887,027.55 and 352,406.09

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Solution

The fourth proportional to 642,767.20, 887,027.55 and 352,406.09 is: 486,325.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,767.20 : 887,027.55 = 352,406.09 : x
  2. Step 2: Convert to fraction form
    642,767.20/887,027.55 = 352,406.09/x
  3. Step 3: Cross multiply
    642,767.20x = 887,027.55 × 352,406.09
  4. Step 4: Simplify right side
    642,767.20x = 312,593,910,617.78
  5. Step 5: Solve for x
    x = 312,593,910,617.78/642,767.20
  6. Step 6: Final answer
    x = 486,325.24

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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.