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Finding the Fourth Proportional to 275,430.10, 413,145.15 and 191,011.90

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Solution

The fourth proportional to 275,430.10, 413,145.15 and 191,011.90 is: 286,517.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,430.10 : 413,145.15 = 191,011.90 : x
  2. Step 2: Convert to fraction form
    275,430.10/413,145.15 = 191,011.90/x
  3. Step 3: Cross multiply
    275,430.10x = 413,145.15 × 191,011.90
  4. Step 4: Simplify right side
    275,430.10x = 78,915,640,077.29
  5. Step 5: Solve for x
    x = 78,915,640,077.29/275,430.10
  6. Step 6: Final answer
    x = 286,517.85

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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.