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Finding the Fourth Proportional to 661.02, 994.92 and 581.64

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Solution

The fourth proportional to 661.02, 994.92 and 581.64 is: 875.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.02 : 994.92 = 581.64 : x
  2. Step 2: Convert to fraction form
    661.02/994.92 = 581.64/x
  3. Step 3: Cross multiply
    661.02x = 994.92 × 581.64
  4. Step 4: Simplify right side
    661.02x = 578,685.27
  5. Step 5: Solve for x
    x = 578,685.27/661.02
  6. Step 6: Final answer
    x = 875.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.