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Finding the Fourth Proportional to 518,286.40, 715,206.28 and 285,705.84

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Solution

The fourth proportional to 518,286.40, 715,206.28 and 285,705.84 is: 394,258.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,286.40 : 715,206.28 = 285,705.84 : x
  2. Step 2: Convert to fraction form
    518,286.40/715,206.28 = 285,705.84/x
  3. Step 3: Cross multiply
    518,286.40x = 715,206.28 × 285,705.84
  4. Step 4: Simplify right side
    518,286.40x = 204,338,611,000.68
  5. Step 5: Solve for x
    x = 204,338,611,000.68/518,286.40
  6. Step 6: Final answer
    x = 394,258.10

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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.