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Finding the Fourth Proportional to 507,141.20, 699,876.72 and 280,786.70

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Solution

The fourth proportional to 507,141.20, 699,876.72 and 280,786.70 is: 387,497.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,141.20 : 699,876.72 = 280,786.70 : x
  2. Step 2: Convert to fraction form
    507,141.20/699,876.72 = 280,786.70/x
  3. Step 3: Cross multiply
    507,141.20x = 699,876.72 × 280,786.70
  4. Step 4: Simplify right side
    507,141.20x = 196,516,071,116.24
  5. Step 5: Solve for x
    x = 196,516,071,116.24/507,141.20
  6. Step 6: Final answer
    x = 387,497.75

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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.