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Finding the Fourth Proportional to 570,299.12, 787,003.26 and 315,644.84

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Solution

The fourth proportional to 570,299.12, 787,003.26 and 315,644.84 is: 435,584.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,299.12 : 787,003.26 = 315,644.84 : x
  2. Step 2: Convert to fraction form
    570,299.12/787,003.26 = 315,644.84/x
  3. Step 3: Cross multiply
    570,299.12x = 787,003.26 × 315,644.84
  4. Step 4: Simplify right side
    570,299.12x = 248,413,518,082.18
  5. Step 5: Solve for x
    x = 248,413,518,082.18/570,299.12
  6. Step 6: Final answer
    x = 435,584.61

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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.