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Finding the Fourth Proportional to 318,775.58, 477,804.53 and 139,012.28

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Solution

The fourth proportional to 318,775.58, 477,804.53 and 139,012.28 is: 208,361.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,775.58 : 477,804.53 = 139,012.28 : x
  2. Step 2: Convert to fraction form
    318,775.58/477,804.53 = 139,012.28/x
  3. Step 3: Cross multiply
    318,775.58x = 477,804.53 × 139,012.28
  4. Step 4: Simplify right side
    318,775.58x = 66,420,697,109.63
  5. Step 5: Solve for x
    x = 66,420,697,109.63/318,775.58
  6. Step 6: Final answer
    x = 208,361.94

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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.