Home / 380,983.89-571,475.79-128,243.16

Finding the Fourth Proportional to 380,983.89, 571,475.79 and 128,243.16

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Solution

The fourth proportional to 380,983.89, 571,475.79 and 128,243.16 is: 192,364.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,983.89 : 571,475.79 = 128,243.16 : x
  2. Step 2: Convert to fraction form
    380,983.89/571,475.79 = 128,243.16/x
  3. Step 3: Cross multiply
    380,983.89x = 571,475.79 × 128,243.16
  4. Step 4: Simplify right side
    380,983.89x = 73,287,861,173.10
  5. Step 5: Solve for x
    x = 73,287,861,173.10/380,983.89
  6. Step 6: Final answer
    x = 192,364.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.