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Finding the Fourth Proportional to 483,630.64, 725,445 and 128,645.08

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Solution

The fourth proportional to 483,630.64, 725,445 and 128,645.08 is: 192,967.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,630.64 : 725,445 = 128,645.08 : x
  2. Step 2: Convert to fraction form
    483,630.64/725,445 = 128,645.08/x
  3. Step 3: Cross multiply
    483,630.64x = 725,445 × 128,645.08
  4. Step 4: Simplify right side
    483,630.64x = 93,324,930,060.60
  5. Step 5: Solve for x
    x = 93,324,930,060.60/483,630.64
  6. Step 6: Final answer
    x = 192,967.36

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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.