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Finding the Fourth Proportional to 303,059.40, 455,245.20 and 291,905.70

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Solution

The fourth proportional to 303,059.40, 455,245.20 and 291,905.70 is: 438,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,059.40 : 455,245.20 = 291,905.70 : x
  2. Step 2: Convert to fraction form
    303,059.40/455,245.20 = 291,905.70/x
  3. Step 3: Cross multiply
    303,059.40x = 455,245.20 × 291,905.70
  4. Step 4: Simplify right side
    303,059.40x = 132,888,668,777.64
  5. Step 5: Solve for x
    x = 132,888,668,777.64/303,059.40
  6. Step 6: Final answer
    x = 438,490.50

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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.