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Finding the Fourth Proportional to 1,587.22, 2,381.51 and 662.99

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Solution

The fourth proportional to 1,587.22, 2,381.51 and 662.99 is: 994.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.22 : 2,381.51 = 662.99 : x
  2. Step 2: Convert to fraction form
    1,587.22/2,381.51 = 662.99/x
  3. Step 3: Cross multiply
    1,587.22x = 2,381.51 × 662.99
  4. Step 4: Simplify right side
    1,587.22x = 1,578,905.20
  5. Step 5: Solve for x
    x = 1,578,905.20/1,587.22
  6. Step 6: Final answer
    x = 994.76

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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.