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Finding the Fourth Proportional to 690.89, 952.34 and 469.45

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Solution

The fourth proportional to 690.89, 952.34 and 469.45 is: 647.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.89 : 952.34 = 469.45 : x
  2. Step 2: Convert to fraction form
    690.89/952.34 = 469.45/x
  3. Step 3: Cross multiply
    690.89x = 952.34 × 469.45
  4. Step 4: Simplify right side
    690.89x = 447,077.50
  5. Step 5: Solve for x
    x = 447,077.50/690.89
  6. Step 6: Final answer
    x = 647.11

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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.