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Finding the Fourth Proportional to 672,611.54, 928,217.86 and 378,266.89

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Solution

The fourth proportional to 672,611.54, 928,217.86 and 378,266.89 is: 522,016.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,611.54 : 928,217.86 = 378,266.89 : x
  2. Step 2: Convert to fraction form
    672,611.54/928,217.86 = 378,266.89/x
  3. Step 3: Cross multiply
    672,611.54x = 928,217.86 × 378,266.89
  4. Step 4: Simplify right side
    672,611.54x = 351,114,078,932.78
  5. Step 5: Solve for x
    x = 351,114,078,932.78/672,611.54
  6. Step 6: Final answer
    x = 522,016.14

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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.