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Finding the Fourth Proportional to 453,979.40, 680,969.10 and 121,555.40

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Solution

The fourth proportional to 453,979.40, 680,969.10 and 121,555.40 is: 182,333.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,979.40 : 680,969.10 = 121,555.40 : x
  2. Step 2: Convert to fraction form
    453,979.40/680,969.10 = 121,555.40/x
  3. Step 3: Cross multiply
    453,979.40x = 680,969.10 × 121,555.40
  4. Step 4: Simplify right side
    453,979.40x = 82,775,471,338.14
  5. Step 5: Solve for x
    x = 82,775,471,338.14/453,979.40
  6. Step 6: Final answer
    x = 182,333.10

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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.