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Finding the Fourth Proportional to 641,378.08, 961,911.60 and 267,196.96

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Solution

The fourth proportional to 641,378.08, 961,911.60 and 267,196.96 is: 400,730.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,378.08 : 961,911.60 = 267,196.96 : x
  2. Step 2: Convert to fraction form
    641,378.08/961,911.60 = 267,196.96/x
  3. Step 3: Cross multiply
    641,378.08x = 961,911.60 × 267,196.96
  4. Step 4: Simplify right side
    641,378.08x = 257,019,855,308.74
  5. Step 5: Solve for x
    x = 257,019,855,308.74/641,378.08
  6. Step 6: Final answer
    x = 400,730.65

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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.