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Finding the Fourth Proportional to 1,101.55, 1,653.54 and 553.59

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Solution

The fourth proportional to 1,101.55, 1,653.54 and 553.59 is: 830.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.55 : 1,653.54 = 553.59 : x
  2. Step 2: Convert to fraction form
    1,101.55/1,653.54 = 553.59/x
  3. Step 3: Cross multiply
    1,101.55x = 1,653.54 × 553.59
  4. Step 4: Simplify right side
    1,101.55x = 915,374.94
  5. Step 5: Solve for x
    x = 915,374.94/1,101.55
  6. Step 6: Final answer
    x = 830.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.