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Finding the Fourth Proportional to 381,254.99, 571,483.49 and 128,448.11

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Solution

The fourth proportional to 381,254.99, 571,483.49 and 128,448.11 is: 192,537.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,254.99 : 571,483.49 = 128,448.11 : x
  2. Step 2: Convert to fraction form
    381,254.99/571,483.49 = 128,448.11/x
  3. Step 3: Cross multiply
    381,254.99x = 571,483.49 × 128,448.11
  4. Step 4: Simplify right side
    381,254.99x = 73,405,974,973.17
  5. Step 5: Solve for x
    x = 73,405,974,973.17/381,254.99
  6. Step 6: Final answer
    x = 192,537.74

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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.