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Finding the Fourth Proportional to 570,469.90, 787,218.48 and 312,297.38

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Solution

The fourth proportional to 570,469.90, 787,218.48 and 312,297.38 is: 430,953.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,469.90 : 787,218.48 = 312,297.38 : x
  2. Step 2: Convert to fraction form
    570,469.90/787,218.48 = 312,297.38/x
  3. Step 3: Cross multiply
    570,469.90x = 787,218.48 × 312,297.38
  4. Step 4: Simplify right side
    570,469.90x = 245,846,268,791.58
  5. Step 5: Solve for x
    x = 245,846,268,791.58/570,469.90
  6. Step 6: Final answer
    x = 430,953.97

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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.