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Finding the Fourth Proportional to 445,448.70, 668,173.02 and 129,905.58

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Solution

The fourth proportional to 445,448.70, 668,173.02 and 129,905.58 is: 194,858.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,448.70 : 668,173.02 = 129,905.58 : x
  2. Step 2: Convert to fraction form
    445,448.70/668,173.02 = 129,905.58/x
  3. Step 3: Cross multiply
    445,448.70x = 668,173.02 × 129,905.58
  4. Step 4: Simplify right side
    445,448.70x = 86,799,403,703.45
  5. Step 5: Solve for x
    x = 86,799,403,703.45/445,448.70
  6. Step 6: Final answer
    x = 194,858.36

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1.5x scale

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.