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Finding the Fourth Proportional to 365,538.80, 548,308.20 and 128,905.40

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Solution

The fourth proportional to 365,538.80, 548,308.20 and 128,905.40 is: 193,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,538.80 : 548,308.20 = 128,905.40 : x
  2. Step 2: Convert to fraction form
    365,538.80/548,308.20 = 128,905.40/x
  3. Step 3: Cross multiply
    365,538.80x = 548,308.20 × 128,905.40
  4. Step 4: Simplify right side
    365,538.80x = 70,679,887,844.28
  5. Step 5: Solve for x
    x = 70,679,887,844.28/365,538.80
  6. Step 6: Final answer
    x = 193,358.10

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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.