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Finding the Fourth Proportional to 664,326.20, 916,820.90 and 377,829.20

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Solution

The fourth proportional to 664,326.20, 916,820.90 and 377,829.20 is: 521,433.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,326.20 : 916,820.90 = 377,829.20 : x
  2. Step 2: Convert to fraction form
    664,326.20/916,820.90 = 377,829.20/x
  3. Step 3: Cross multiply
    664,326.20x = 916,820.90 × 377,829.20
  4. Step 4: Simplify right side
    664,326.20x = 346,401,700,717.03
  5. Step 5: Solve for x
    x = 346,401,700,717.03/664,326.20
  6. Step 6: Final answer
    x = 521,433.15

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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.