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Finding the Fourth Proportional to 300,907.28, 415,105.08 and 253,143.20

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Solution

The fourth proportional to 300,907.28, 415,105.08 and 253,143.20 is: 349,213.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,907.28 : 415,105.08 = 253,143.20 : x
  2. Step 2: Convert to fraction form
    300,907.28/415,105.08 = 253,143.20/x
  3. Step 3: Cross multiply
    300,907.28x = 415,105.08 × 253,143.20
  4. Step 4: Simplify right side
    300,907.28x = 105,081,028,287.46
  5. Step 5: Solve for x
    x = 105,081,028,287.46/300,907.28
  6. Step 6: Final answer
    x = 349,213.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.