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Finding the Fourth Proportional to 428,283.76, 591,006.90 and 237,285.76

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Solution

The fourth proportional to 428,283.76, 591,006.90 and 237,285.76 is: 327,440.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,283.76 : 591,006.90 = 237,285.76 : x
  2. Step 2: Convert to fraction form
    428,283.76/591,006.90 = 237,285.76/x
  3. Step 3: Cross multiply
    428,283.76x = 591,006.90 × 237,285.76
  4. Step 4: Simplify right side
    428,283.76x = 140,237,521,431.74
  5. Step 5: Solve for x
    x = 140,237,521,431.74/428,283.76
  6. Step 6: Final answer
    x = 327,440.67

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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.