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Finding the Fourth Proportional to 483,602.40, 725,403.60 and 128,652.30

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Solution

The fourth proportional to 483,602.40, 725,403.60 and 128,652.30 is: 192,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,602.40 : 725,403.60 = 128,652.30 : x
  2. Step 2: Convert to fraction form
    483,602.40/725,403.60 = 128,652.30/x
  3. Step 3: Cross multiply
    483,602.40x = 725,403.60 × 128,652.30
  4. Step 4: Simplify right side
    483,602.40x = 93,324,841,568.28
  5. Step 5: Solve for x
    x = 93,324,841,568.28/483,602.40
  6. Step 6: Final answer
    x = 192,978.45

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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.