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Finding the Fourth Proportional to 403,218.40, 604,827.60 and 396,997.60

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Solution

The fourth proportional to 403,218.40, 604,827.60 and 396,997.60 is: 595,496.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,218.40 : 604,827.60 = 396,997.60 : x
  2. Step 2: Convert to fraction form
    403,218.40/604,827.60 = 396,997.60/x
  3. Step 3: Cross multiply
    403,218.40x = 604,827.60 × 396,997.60
  4. Step 4: Simplify right side
    403,218.40x = 240,115,105,613.76
  5. Step 5: Solve for x
    x = 240,115,105,613.76/403,218.40
  6. Step 6: Final answer
    x = 595,496.40

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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.