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Finding the Fourth Proportional to 483,614.40, 725,421.60 and 128,664.30

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Solution

The fourth proportional to 483,614.40, 725,421.60 and 128,664.30 is: 192,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,614.40 : 725,421.60 = 128,664.30 : x
  2. Step 2: Convert to fraction form
    483,614.40/725,421.60 = 128,664.30/x
  3. Step 3: Cross multiply
    483,614.40x = 725,421.60 × 128,664.30
  4. Step 4: Simplify right side
    483,614.40x = 93,335,862,368.88
  5. Step 5: Solve for x
    x = 93,335,862,368.88/483,614.40
  6. Step 6: Final answer
    x = 192,996.45

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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.