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Finding the Fourth Proportional to 1,353.55, 2,030.46 and 660.59

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Solution

The fourth proportional to 1,353.55, 2,030.46 and 660.59 is: 990.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.55 : 2,030.46 = 660.59 : x
  2. Step 2: Convert to fraction form
    1,353.55/2,030.46 = 660.59/x
  3. Step 3: Cross multiply
    1,353.55x = 2,030.46 × 660.59
  4. Step 4: Simplify right side
    1,353.55x = 1,341,301.57
  5. Step 5: Solve for x
    x = 1,341,301.57/1,353.55
  6. Step 6: Final answer
    x = 990.95

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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.