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Finding the Fourth Proportional to 338,408.90, 507,613.35 and 279,311.30

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Solution

The fourth proportional to 338,408.90, 507,613.35 and 279,311.30 is: 418,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,408.90 : 507,613.35 = 279,311.30 : x
  2. Step 2: Convert to fraction form
    338,408.90/507,613.35 = 279,311.30/x
  3. Step 3: Cross multiply
    338,408.90x = 507,613.35 × 279,311.30
  4. Step 4: Simplify right side
    338,408.90x = 141,782,144,685.86
  5. Step 5: Solve for x
    x = 141,782,144,685.86/338,408.90
  6. Step 6: Final answer
    x = 418,966.95

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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.