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Finding the Fourth Proportional to 676.61, 1,014.73 and 429.45

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Solution

The fourth proportional to 676.61, 1,014.73 and 429.45 is: 644.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.61 : 1,014.73 = 429.45 : x
  2. Step 2: Convert to fraction form
    676.61/1,014.73 = 429.45/x
  3. Step 3: Cross multiply
    676.61x = 1,014.73 × 429.45
  4. Step 4: Simplify right side
    676.61x = 435,774.72
  5. Step 5: Solve for x
    x = 435,774.72/676.61
  6. Step 6: Final answer
    x = 644.05

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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.