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Finding the Fourth Proportional to 538,230.20, 807,345.30 and 455,286.20

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Solution

The fourth proportional to 538,230.20, 807,345.30 and 455,286.20 is: 682,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,230.20 : 807,345.30 = 455,286.20 : x
  2. Step 2: Convert to fraction form
    538,230.20/807,345.30 = 455,286.20/x
  3. Step 3: Cross multiply
    538,230.20x = 807,345.30 × 455,286.20
  4. Step 4: Simplify right side
    538,230.20x = 367,573,173,724.86
  5. Step 5: Solve for x
    x = 367,573,173,724.86/538,230.20
  6. Step 6: Final answer
    x = 682,929.30

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Half scale
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Double scale
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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.