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Finding the Fourth Proportional to 385,806.06, 578,616.12 and 115,877.41

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Solution

The fourth proportional to 385,806.06, 578,616.12 and 115,877.41 is: 173,788.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,806.06 : 578,616.12 = 115,877.41 : x
  2. Step 2: Convert to fraction form
    385,806.06/578,616.12 = 115,877.41/x
  3. Step 3: Cross multiply
    385,806.06x = 578,616.12 × 115,877.41
  4. Step 4: Simplify right side
    385,806.06x = 67,048,537,369.85
  5. Step 5: Solve for x
    x = 67,048,537,369.85/385,806.06
  6. Step 6: Final answer
    x = 173,788.19

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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.