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Finding the Fourth Proportional to 380,805.87, 571,237.56 and 128,087.10

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Solution

The fourth proportional to 380,805.87, 571,237.56 and 128,087.10 is: 192,140.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,805.87 : 571,237.56 = 128,087.10 : x
  2. Step 2: Convert to fraction form
    380,805.87/571,237.56 = 128,087.10/x
  3. Step 3: Cross multiply
    380,805.87x = 571,237.56 × 128,087.10
  4. Step 4: Simplify right side
    380,805.87x = 73,168,162,471.48
  5. Step 5: Solve for x
    x = 73,168,162,471.48/380,805.87
  6. Step 6: Final answer
    x = 192,140.32

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1.5x scale

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.