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Finding the Fourth Proportional to 428,278.76, 591,000 and 237,280.76

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Solution

The fourth proportional to 428,278.76, 591,000 and 237,280.76 is: 327,433.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,278.76 : 591,000 = 237,280.76 : x
  2. Step 2: Convert to fraction form
    428,278.76/591,000 = 237,280.76/x
  3. Step 3: Cross multiply
    428,278.76x = 591,000 × 237,280.76
  4. Step 4: Simplify right side
    428,278.76x = 140,232,929,160
  5. Step 5: Solve for x
    x = 140,232,929,160/428,278.76
  6. Step 6: Final answer
    x = 327,433.77

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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.