Home / 686,391.32-1,028,861.05-253,830.81

Finding the Fourth Proportional to 686,391.32, 1,028,861.05 and 253,830.81

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Solution

The fourth proportional to 686,391.32, 1,028,861.05 and 253,830.81 is: 380,477.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,391.32 : 1,028,861.05 = 253,830.81 : x
  2. Step 2: Convert to fraction form
    686,391.32/1,028,861.05 = 253,830.81/x
  3. Step 3: Cross multiply
    686,391.32x = 1,028,861.05 × 253,830.81
  4. Step 4: Simplify right side
    686,391.32x = 261,156,636,684.64
  5. Step 5: Solve for x
    x = 261,156,636,684.64/686,391.32
  6. Step 6: Final answer
    x = 380,477.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.