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Finding the Fourth Proportional to 885,613.80, 1,328,420.70 and 254,490.60

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Solution

The fourth proportional to 885,613.80, 1,328,420.70 and 254,490.60 is: 381,735.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,613.80 : 1,328,420.70 = 254,490.60 : x
  2. Step 2: Convert to fraction form
    885,613.80/1,328,420.70 = 254,490.60/x
  3. Step 3: Cross multiply
    885,613.80x = 1,328,420.70 × 254,490.60
  4. Step 4: Simplify right side
    885,613.80x = 338,070,580,995.42
  5. Step 5: Solve for x
    x = 338,070,580,995.42/885,613.80
  6. Step 6: Final answer
    x = 381,735.90

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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.