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Finding the Fourth Proportional to 483,695.40, 725,543.10 and 128,745.30

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Solution

The fourth proportional to 483,695.40, 725,543.10 and 128,745.30 is: 193,117.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,695.40 : 725,543.10 = 128,745.30 : x
  2. Step 2: Convert to fraction form
    483,695.40/725,543.10 = 128,745.30/x
  3. Step 3: Cross multiply
    483,695.40x = 725,543.10 × 128,745.30
  4. Step 4: Simplify right side
    483,695.40x = 93,410,264,072.43
  5. Step 5: Solve for x
    x = 93,410,264,072.43/483,695.40
  6. Step 6: Final answer
    x = 193,117.95

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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.