Home / 428,088.70-591,159.51-320,471.90

Finding the Fourth Proportional to 428,088.70, 591,159.51 and 320,471.90

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Solution

The fourth proportional to 428,088.70, 591,159.51 and 320,471.90 is: 442,548.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,088.70 : 591,159.51 = 320,471.90 : x
  2. Step 2: Convert to fraction form
    428,088.70/591,159.51 = 320,471.90/x
  3. Step 3: Cross multiply
    428,088.70x = 591,159.51 × 320,471.90
  4. Step 4: Simplify right side
    428,088.70x = 189,450,011,372.77
  5. Step 5: Solve for x
    x = 189,450,011,372.77/428,088.70
  6. Step 6: Final answer
    x = 442,548.50

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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.