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Finding the Fourth Proportional to 1,089.56, 1,503.60 and 617.48

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Solution

The fourth proportional to 1,089.56, 1,503.60 and 617.48 is: 852.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.56 : 1,503.60 = 617.48 : x
  2. Step 2: Convert to fraction form
    1,089.56/1,503.60 = 617.48/x
  3. Step 3: Cross multiply
    1,089.56x = 1,503.60 × 617.48
  4. Step 4: Simplify right side
    1,089.56x = 928,442.93
  5. Step 5: Solve for x
    x = 928,442.93/1,089.56
  6. Step 6: Final answer
    x = 852.13

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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.