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Finding the Fourth Proportional to 717.63, 989.89 and 469.06

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Solution

The fourth proportional to 717.63, 989.89 and 469.06 is: 647.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.63 : 989.89 = 469.06 : x
  2. Step 2: Convert to fraction form
    717.63/989.89 = 469.06/x
  3. Step 3: Cross multiply
    717.63x = 989.89 × 469.06
  4. Step 4: Simplify right side
    717.63x = 464,317.80
  5. Step 5: Solve for x
    x = 464,317.80/717.63
  6. Step 6: Final answer
    x = 647.02

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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.