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Finding the Fourth Proportional to 542,408.80, 813,613.20 and 290,466.40

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Solution

The fourth proportional to 542,408.80, 813,613.20 and 290,466.40 is: 435,699.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,408.80 : 813,613.20 = 290,466.40 : x
  2. Step 2: Convert to fraction form
    542,408.80/813,613.20 = 290,466.40/x
  3. Step 3: Cross multiply
    542,408.80x = 813,613.20 × 290,466.40
  4. Step 4: Simplify right side
    542,408.80x = 236,327,297,196.48
  5. Step 5: Solve for x
    x = 236,327,297,196.48/542,408.80
  6. Step 6: Final answer
    x = 435,699.60

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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.