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Finding the Fourth Proportional to 667,380.89, 921,066.55 and 377,004.69

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Solution

The fourth proportional to 667,380.89, 921,066.55 and 377,004.69 is: 520,312.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,380.89 : 921,066.55 = 377,004.69 : x
  2. Step 2: Convert to fraction form
    667,380.89/921,066.55 = 377,004.69/x
  3. Step 3: Cross multiply
    667,380.89x = 921,066.55 × 377,004.69
  4. Step 4: Simplify right side
    667,380.89x = 347,246,408,209.61
  5. Step 5: Solve for x
    x = 347,246,408,209.61/667,380.89
  6. Step 6: Final answer
    x = 520,312.18

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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.