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Finding the Fourth Proportional to 385,110.79, 577,443.83 and 118,799.80

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Solution

The fourth proportional to 385,110.79, 577,443.83 and 118,799.80 is: 178,131.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,110.79 : 577,443.83 = 118,799.80 : x
  2. Step 2: Convert to fraction form
    385,110.79/577,443.83 = 118,799.80/x
  3. Step 3: Cross multiply
    385,110.79x = 577,443.83 × 118,799.80
  4. Step 4: Simplify right side
    385,110.79x = 68,600,211,515.23
  5. Step 5: Solve for x
    x = 68,600,211,515.23/385,110.79
  6. Step 6: Final answer
    x = 178,131.11

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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.