Home / 304,865.40-457,298.10-287,758.20

Finding the Fourth Proportional to 304,865.40, 457,298.10 and 287,758.20

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Solution

The fourth proportional to 304,865.40, 457,298.10 and 287,758.20 is: 431,637.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,865.40 : 457,298.10 = 287,758.20 : x
  2. Step 2: Convert to fraction form
    304,865.40/457,298.10 = 287,758.20/x
  3. Step 3: Cross multiply
    304,865.40x = 457,298.10 × 287,758.20
  4. Step 4: Simplify right side
    304,865.40x = 131,591,278,119.42
  5. Step 5: Solve for x
    x = 131,591,278,119.42/304,865.40
  6. Step 6: Final answer
    x = 431,637.30

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Similar ratio
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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.