Home / 687,383.20-1,029,854.76-287,143.12

Finding the Fourth Proportional to 687,383.20, 1,029,854.76 and 287,143.12

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Solution

The fourth proportional to 687,383.20, 1,029,854.76 and 287,143.12 is: 430,205.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,383.20 : 1,029,854.76 = 287,143.12 : x
  2. Step 2: Convert to fraction form
    687,383.20/1,029,854.76 = 287,143.12/x
  3. Step 3: Cross multiply
    687,383.20x = 1,029,854.76 × 287,143.12
  4. Step 4: Simplify right side
    687,383.20x = 295,715,708,933.25
  5. Step 5: Solve for x
    x = 295,715,708,933.25/687,383.20
  6. Step 6: Final answer
    x = 430,205.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.