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Finding the Fourth Proportional to 309,394.62, 426,990.69 and 173,426.40

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Solution

The fourth proportional to 309,394.62, 426,990.69 and 173,426.40 is: 239,343.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,394.62 : 426,990.69 = 173,426.40 : x
  2. Step 2: Convert to fraction form
    309,394.62/426,990.69 = 173,426.40/x
  3. Step 3: Cross multiply
    309,394.62x = 426,990.69 × 173,426.40
  4. Step 4: Simplify right side
    309,394.62x = 74,051,458,200.22
  5. Step 5: Solve for x
    x = 74,051,458,200.22/309,394.62
  6. Step 6: Final answer
    x = 239,343.07

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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.