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Finding the Fourth Proportional to 518,885.26, 778,263.50 and 139,835.64

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Solution

The fourth proportional to 518,885.26, 778,263.50 and 139,835.64 is: 209,736.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,885.26 : 778,263.50 = 139,835.64 : x
  2. Step 2: Convert to fraction form
    518,885.26/778,263.50 = 139,835.64/x
  3. Step 3: Cross multiply
    518,885.26x = 778,263.50 × 139,835.64
  4. Step 4: Simplify right side
    518,885.26x = 108,828,974,611.14
  5. Step 5: Solve for x
    x = 108,828,974,611.14/518,885.26
  6. Step 6: Final answer
    x = 209,736.11

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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.