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Finding the Fourth Proportional to 486,295.12, 671,199.24 and 285,155.92

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Solution

The fourth proportional to 486,295.12, 671,199.24 and 285,155.92 is: 393,580.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,295.12 : 671,199.24 = 285,155.92 : x
  2. Step 2: Convert to fraction form
    486,295.12/671,199.24 = 285,155.92/x
  3. Step 3: Cross multiply
    486,295.12x = 671,199.24 × 285,155.92
  4. Step 4: Simplify right side
    486,295.12x = 191,396,436,785.50
  5. Step 5: Solve for x
    x = 191,396,436,785.50/486,295.12
  6. Step 6: Final answer
    x = 393,580.83

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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.