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Finding the Fourth Proportional to 884.58, 1,220.46 and 553.02

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Solution

The fourth proportional to 884.58, 1,220.46 and 553.02 is: 763.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.58 : 1,220.46 = 553.02 : x
  2. Step 2: Convert to fraction form
    884.58/1,220.46 = 553.02/x
  3. Step 3: Cross multiply
    884.58x = 1,220.46 × 553.02
  4. Step 4: Simplify right side
    884.58x = 674,938.79
  5. Step 5: Solve for x
    x = 674,938.79/884.58
  6. Step 6: Final answer
    x = 763.00

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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.