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Finding the Fourth Proportional to 368,462.85, 552,948.09 and 128,578.11

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Solution

The fourth proportional to 368,462.85, 552,948.09 and 128,578.11 is: 192,955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,462.85 : 552,948.09 = 128,578.11 : x
  2. Step 2: Convert to fraction form
    368,462.85/552,948.09 = 128,578.11/x
  3. Step 3: Cross multiply
    368,462.85x = 552,948.09 × 128,578.11
  4. Step 4: Simplify right side
    368,462.85x = 71,097,020,340.31
  5. Step 5: Solve for x
    x = 71,097,020,340.31/368,462.85
  6. Step 6: Final answer
    x = 192,955.74

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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.