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Finding the Fourth Proportional to 518,699.05, 715,532.60 and 422,010.92

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Solution

The fourth proportional to 518,699.05, 715,532.60 and 422,010.92 is: 582,153.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,699.05 : 715,532.60 = 422,010.92 : x
  2. Step 2: Convert to fraction form
    518,699.05/715,532.60 = 422,010.92/x
  3. Step 3: Cross multiply
    518,699.05x = 715,532.60 × 422,010.92
  4. Step 4: Simplify right side
    518,699.05x = 301,962,568,705.94
  5. Step 5: Solve for x
    x = 301,962,568,705.94/518,699.05
  6. Step 6: Final answer
    x = 582,153.70

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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.