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Finding the Fourth Proportional to 385,270.60, 577,905.90 and 135,952.60

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Solution

The fourth proportional to 385,270.60, 577,905.90 and 135,952.60 is: 203,928.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,270.60 : 577,905.90 = 135,952.60 : x
  2. Step 2: Convert to fraction form
    385,270.60/577,905.90 = 135,952.60/x
  3. Step 3: Cross multiply
    385,270.60x = 577,905.90 × 135,952.60
  4. Step 4: Simplify right side
    385,270.60x = 78,567,809,660.34
  5. Step 5: Solve for x
    x = 78,567,809,660.34/385,270.60
  6. Step 6: Final answer
    x = 203,928.90

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Half scale
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Double scale
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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.