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Finding the Fourth Proportional to 653.34, 983.91 and 551.28

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Solution

The fourth proportional to 653.34, 983.91 and 551.28 is: 830.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.34 : 983.91 = 551.28 : x
  2. Step 2: Convert to fraction form
    653.34/983.91 = 551.28/x
  3. Step 3: Cross multiply
    653.34x = 983.91 × 551.28
  4. Step 4: Simplify right side
    653.34x = 542,409.90
  5. Step 5: Solve for x
    x = 542,409.90/653.34
  6. Step 6: Final answer
    x = 830.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.