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Finding the Fourth Proportional to 520,361.17, 780,630.76 and 178,788.22

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Solution

The fourth proportional to 520,361.17, 780,630.76 and 178,788.22 is: 268,212.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,361.17 : 780,630.76 = 178,788.22 : x
  2. Step 2: Convert to fraction form
    520,361.17/780,630.76 = 178,788.22/x
  3. Step 3: Cross multiply
    520,361.17x = 780,630.76 × 178,788.22
  4. Step 4: Simplify right side
    520,361.17x = 139,567,583,163.71
  5. Step 5: Solve for x
    x = 139,567,583,163.71/520,361.17
  6. Step 6: Final answer
    x = 268,212.91

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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.