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Finding the Fourth Proportional to 318,774.83, 477,803.41 and 139,011.53

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Solution

The fourth proportional to 318,774.83, 477,803.41 and 139,011.53 is: 208,360.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,774.83 : 477,803.41 = 139,011.53 : x
  2. Step 2: Convert to fraction form
    318,774.83/477,803.41 = 139,011.53/x
  3. Step 3: Cross multiply
    318,774.83x = 477,803.41 × 139,011.53
  4. Step 4: Simplify right side
    318,774.83x = 66,420,183,063.32
  5. Step 5: Solve for x
    x = 66,420,183,063.32/318,774.83
  6. Step 6: Final answer
    x = 208,360.81

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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.