Home / 709,720.20-979,282.85-403,778.72

Finding the Fourth Proportional to 709,720.20, 979,282.85 and 403,778.72

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Solution

The fourth proportional to 709,720.20, 979,282.85 and 403,778.72 is: 557,140.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,720.20 : 979,282.85 = 403,778.72 : x
  2. Step 2: Convert to fraction form
    709,720.20/979,282.85 = 403,778.72/x
  3. Step 3: Cross multiply
    709,720.20x = 979,282.85 × 403,778.72
  4. Step 4: Simplify right side
    709,720.20x = 395,413,576,120.27
  5. Step 5: Solve for x
    x = 395,413,576,120.27/709,720.20
  6. Step 6: Final answer
    x = 557,140.09

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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.