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Finding the Fourth Proportional to 245,410.68, 338,658 and 137,986.86

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Solution

The fourth proportional to 245,410.68, 338,658 and 137,986.86 is: 190,416.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,410.68 : 338,658 = 137,986.86 : x
  2. Step 2: Convert to fraction form
    245,410.68/338,658 = 137,986.86/x
  3. Step 3: Cross multiply
    245,410.68x = 338,658 × 137,986.86
  4. Step 4: Simplify right side
    245,410.68x = 46,730,354,033.88
  5. Step 5: Solve for x
    x = 46,730,354,033.88/245,410.68
  6. Step 6: Final answer
    x = 190,416.95

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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.