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Finding the Fourth Proportional to 1,158.43, 1,598.79 and 661.00

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Solution

The fourth proportional to 1,158.43, 1,598.79 and 661.00 is: 912.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.43 : 1,598.79 = 661.00 : x
  2. Step 2: Convert to fraction form
    1,158.43/1,598.79 = 661.00/x
  3. Step 3: Cross multiply
    1,158.43x = 1,598.79 × 661.00
  4. Step 4: Simplify right side
    1,158.43x = 1,056,795.70
  5. Step 5: Solve for x
    x = 1,056,795.70/1,158.43
  6. Step 6: Final answer
    x = 912.27

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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.