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Finding the Fourth Proportional to 717.12, 989.06 and 551.07

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Solution

The fourth proportional to 717.12, 989.06 and 551.07 is: 760.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.12 : 989.06 = 551.07 : x
  2. Step 2: Convert to fraction form
    717.12/989.06 = 551.07/x
  3. Step 3: Cross multiply
    717.12x = 989.06 × 551.07
  4. Step 4: Simplify right side
    717.12x = 545,038.54
  5. Step 5: Solve for x
    x = 545,038.54/717.12
  6. Step 6: Final answer
    x = 760.04

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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.