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Finding the Fourth Proportional to 304,449.40, 420,139.56 and 170,313.40

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Solution

The fourth proportional to 304,449.40, 420,139.56 and 170,313.40 is: 235,032.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,449.40 : 420,139.56 = 170,313.40 : x
  2. Step 2: Convert to fraction form
    304,449.40/420,139.56 = 170,313.40/x
  3. Step 3: Cross multiply
    304,449.40x = 420,139.56 × 170,313.40
  4. Step 4: Simplify right side
    304,449.40x = 71,555,396,938.10
  5. Step 5: Solve for x
    x = 71,555,396,938.10/304,449.40
  6. Step 6: Final answer
    x = 235,032.15

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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.