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Finding the Fourth Proportional to 386,625.60, 579,938.40 and 133,905.60

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Solution

The fourth proportional to 386,625.60, 579,938.40 and 133,905.60 is: 200,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,625.60 : 579,938.40 = 133,905.60 : x
  2. Step 2: Convert to fraction form
    386,625.60/579,938.40 = 133,905.60/x
  3. Step 3: Cross multiply
    386,625.60x = 579,938.40 × 133,905.60
  4. Step 4: Simplify right side
    386,625.60x = 77,656,999,415.04
  5. Step 5: Solve for x
    x = 77,656,999,415.04/386,625.60
  6. Step 6: Final answer
    x = 200,858.40

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Similar ratio
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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.