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Finding the Fourth Proportional to 318,774.33, 477,802.66 and 139,011.03

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Solution

The fourth proportional to 318,774.33, 477,802.66 and 139,011.03 is: 208,360.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,774.33 : 477,802.66 = 139,011.03 : x
  2. Step 2: Convert to fraction form
    318,774.33/477,802.66 = 139,011.03/x
  3. Step 3: Cross multiply
    318,774.33x = 477,802.66 × 139,011.03
  4. Step 4: Simplify right side
    318,774.33x = 66,419,839,903.34
  5. Step 5: Solve for x
    x = 66,419,839,903.34/318,774.33
  6. Step 6: Final answer
    x = 208,360.06

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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.