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Finding the Fourth Proportional to 423,676.23, 634,712.85 and 328,439.73

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Solution

The fourth proportional to 423,676.23, 634,712.85 and 328,439.73 is: 492,038.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,676.23 : 634,712.85 = 328,439.73 : x
  2. Step 2: Convert to fraction form
    423,676.23/634,712.85 = 328,439.73/x
  3. Step 3: Cross multiply
    423,676.23x = 634,712.85 × 328,439.73
  4. Step 4: Simplify right side
    423,676.23x = 208,464,916,768.42
  5. Step 5: Solve for x
    x = 208,464,916,768.42/423,676.23
  6. Step 6: Final answer
    x = 492,038.26

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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.