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Finding the Fourth Proportional to 290,709.36, 435,979.80 and 113,176.80

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Solution

The fourth proportional to 290,709.36, 435,979.80 and 113,176.80 is: 169,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,709.36 : 435,979.80 = 113,176.80 : x
  2. Step 2: Convert to fraction form
    290,709.36/435,979.80 = 113,176.80/x
  3. Step 3: Cross multiply
    290,709.36x = 435,979.80 × 113,176.80
  4. Step 4: Simplify right side
    290,709.36x = 49,342,798,628.64
  5. Step 5: Solve for x
    x = 49,342,798,628.64/290,709.36
  6. Step 6: Final answer
    x = 169,732.40

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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.