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Finding the Fourth Proportional to 570,288.15, 786,915.27 and 315,638.73

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Solution

The fourth proportional to 570,288.15, 786,915.27 and 315,638.73 is: 435,535.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,288.15 : 786,915.27 = 315,638.73 : x
  2. Step 2: Convert to fraction form
    570,288.15/786,915.27 = 315,638.73/x
  3. Step 3: Cross multiply
    570,288.15x = 786,915.27 × 315,638.73
  4. Step 4: Simplify right side
    570,288.15x = 248,380,936,440.41
  5. Step 5: Solve for x
    x = 248,380,936,440.41/570,288.15
  6. Step 6: Final answer
    x = 435,535.85

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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.