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Finding the Fourth Proportional to 304,867.40, 457,301.10 and 287,760.20

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Solution

The fourth proportional to 304,867.40, 457,301.10 and 287,760.20 is: 431,640.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,867.40 : 457,301.10 = 287,760.20 : x
  2. Step 2: Convert to fraction form
    304,867.40/457,301.10 = 287,760.20/x
  3. Step 3: Cross multiply
    304,867.40x = 457,301.10 × 287,760.20
  4. Step 4: Simplify right side
    304,867.40x = 131,593,055,996.22
  5. Step 5: Solve for x
    x = 131,593,055,996.22/304,867.40
  6. Step 6: Final answer
    x = 431,640.30

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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.