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Finding the Fourth Proportional to 508,730.72, 702,057.18 and 279,309.30

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Solution

The fourth proportional to 508,730.72, 702,057.18 and 279,309.30 is: 385,451.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,730.72 : 702,057.18 = 279,309.30 : x
  2. Step 2: Convert to fraction form
    508,730.72/702,057.18 = 279,309.30/x
  3. Step 3: Cross multiply
    508,730.72x = 702,057.18 × 279,309.30
  4. Step 4: Simplify right side
    508,730.72x = 196,091,099,505.77
  5. Step 5: Solve for x
    x = 196,091,099,505.77/508,730.72
  6. Step 6: Final answer
    x = 385,451.66

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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.