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Finding the Fourth Proportional to 309,402.45, 426,979.76 and 188,548.83

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Solution

The fourth proportional to 309,402.45, 426,979.76 and 188,548.83 is: 260,200.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,402.45 : 426,979.76 = 188,548.83 : x
  2. Step 2: Convert to fraction form
    309,402.45/426,979.76 = 188,548.83/x
  3. Step 3: Cross multiply
    309,402.45x = 426,979.76 × 188,548.83
  4. Step 4: Simplify right side
    309,402.45x = 80,506,533,238.94
  5. Step 5: Solve for x
    x = 80,506,533,238.94/309,402.45
  6. Step 6: Final answer
    x = 260,200.05

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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.