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Finding the Fourth Proportional to 521,730.10, 783,113.55 and 255,790.90

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Solution

The fourth proportional to 521,730.10, 783,113.55 and 255,790.90 is: 383,940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,730.10 : 783,113.55 = 255,790.90 : x
  2. Step 2: Convert to fraction form
    521,730.10/783,113.55 = 255,790.90/x
  3. Step 3: Cross multiply
    521,730.10x = 783,113.55 × 255,790.90
  4. Step 4: Simplify right side
    521,730.10x = 200,313,319,756.70
  5. Step 5: Solve for x
    x = 200,313,319,756.70/521,730.10
  6. Step 6: Final answer
    x = 383,940.51

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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.