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Finding the Fourth Proportional to 885,775.20, 1,328,662.80 and 413,383.20

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Solution

The fourth proportional to 885,775.20, 1,328,662.80 and 413,383.20 is: 620,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,775.20 : 1,328,662.80 = 413,383.20 : x
  2. Step 2: Convert to fraction form
    885,775.20/1,328,662.80 = 413,383.20/x
  3. Step 3: Cross multiply
    885,775.20x = 1,328,662.80 × 413,383.20
  4. Step 4: Simplify right side
    885,775.20x = 549,246,879,984.96
  5. Step 5: Solve for x
    x = 549,246,879,984.96/885,775.20
  6. Step 6: Final answer
    x = 620,074.80

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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.