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Finding the Fourth Proportional to 518,500.68, 715,530.60 and 280,036.68

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Solution

The fourth proportional to 518,500.68, 715,530.60 and 280,036.68 is: 386,450.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,500.68 : 715,530.60 = 280,036.68 : x
  2. Step 2: Convert to fraction form
    518,500.68/715,530.60 = 280,036.68/x
  3. Step 3: Cross multiply
    518,500.68x = 715,530.60 × 280,036.68
  4. Step 4: Simplify right side
    518,500.68x = 200,374,813,662.41
  5. Step 5: Solve for x
    x = 200,374,813,662.41/518,500.68
  6. Step 6: Final answer
    x = 386,450.44

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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.