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Finding the Fourth Proportional to 318,781.92, 439,920.32 and 191,459.68

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Solution

The fourth proportional to 318,781.92, 439,920.32 and 191,459.68 is: 264,215.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,781.92 : 439,920.32 = 191,459.68 : x
  2. Step 2: Convert to fraction form
    318,781.92/439,920.32 = 191,459.68/x
  3. Step 3: Cross multiply
    318,781.92x = 439,920.32 × 191,459.68
  4. Step 4: Simplify right side
    318,781.92x = 84,227,003,692.70
  5. Step 5: Solve for x
    x = 84,227,003,692.70/318,781.92
  6. Step 6: Final answer
    x = 264,215.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.