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Finding the Fourth Proportional to 318,776.58, 477,806.03 and 139,013.28

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Solution

The fourth proportional to 318,776.58, 477,806.03 and 139,013.28 is: 208,363.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,776.58 : 477,806.03 = 139,013.28 : x
  2. Step 2: Convert to fraction form
    318,776.58/477,806.03 = 139,013.28/x
  3. Step 3: Cross multiply
    318,776.58x = 477,806.03 × 139,013.28
  4. Step 4: Simplify right side
    318,776.58x = 66,421,383,434.08
  5. Step 5: Solve for x
    x = 66,421,383,434.08/318,776.58
  6. Step 6: Final answer
    x = 208,363.44

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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.