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Finding the Fourth Proportional to 570,470.72, 787,218.28 and 312,297.68

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Solution

The fourth proportional to 570,470.72, 787,218.28 and 312,297.68 is: 430,953.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,470.72 : 787,218.28 = 312,297.68 : x
  2. Step 2: Convert to fraction form
    570,470.72/787,218.28 = 312,297.68/x
  3. Step 3: Cross multiply
    570,470.72x = 787,218.28 × 312,297.68
  4. Step 4: Simplify right side
    570,470.72x = 245,846,442,497.59
  5. Step 5: Solve for x
    x = 245,846,442,497.59/570,470.72
  6. Step 6: Final answer
    x = 430,953.66

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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.