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Finding the Fourth Proportional to 699.29, 965.08 and 404.55

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Solution

The fourth proportional to 699.29, 965.08 and 404.55 is: 558.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.29 : 965.08 = 404.55 : x
  2. Step 2: Convert to fraction form
    699.29/965.08 = 404.55/x
  3. Step 3: Cross multiply
    699.29x = 965.08 × 404.55
  4. Step 4: Simplify right side
    699.29x = 390,423.11
  5. Step 5: Solve for x
    x = 390,423.11/699.29
  6. Step 6: Final answer
    x = 558.31

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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.