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Finding the Fourth Proportional to 305,021.60, 457,532.40 and 83,405.60

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Solution

The fourth proportional to 305,021.60, 457,532.40 and 83,405.60 is: 125,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,021.60 : 457,532.40 = 83,405.60 : x
  2. Step 2: Convert to fraction form
    305,021.60/457,532.40 = 83,405.60/x
  3. Step 3: Cross multiply
    305,021.60x = 457,532.40 × 83,405.60
  4. Step 4: Simplify right side
    305,021.60x = 38,160,764,341.44
  5. Step 5: Solve for x
    x = 38,160,764,341.44/305,021.60
  6. Step 6: Final answer
    x = 125,108.40

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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.