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Finding the Fourth Proportional to 308,129.81, 425,337.62 and 275,807.30

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Solution

The fourth proportional to 308,129.81, 425,337.62 and 275,807.30 is: 380,720.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,129.81 : 425,337.62 = 275,807.30 : x
  2. Step 2: Convert to fraction form
    308,129.81/425,337.62 = 275,807.30/x
  3. Step 3: Cross multiply
    308,129.81x = 425,337.62 × 275,807.30
  4. Step 4: Simplify right side
    308,129.81x = 117,311,217,054.90
  5. Step 5: Solve for x
    x = 117,311,217,054.90/308,129.81
  6. Step 6: Final answer
    x = 380,720.12

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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.