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Finding the Fourth Proportional to 542,808.80, 814,213.20 and 402,840.80

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Solution

The fourth proportional to 542,808.80, 814,213.20 and 402,840.80 is: 604,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,808.80 : 814,213.20 = 402,840.80 : x
  2. Step 2: Convert to fraction form
    542,808.80/814,213.20 = 402,840.80/x
  3. Step 3: Cross multiply
    542,808.80x = 814,213.20 × 402,840.80
  4. Step 4: Simplify right side
    542,808.80x = 327,998,296,858.56
  5. Step 5: Solve for x
    x = 327,998,296,858.56/542,808.80
  6. Step 6: Final answer
    x = 604,261.20

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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.