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Finding the Fourth Proportional to 2,387.34, 3,581.21 and 655.96

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Solution

The fourth proportional to 2,387.34, 3,581.21 and 655.96 is: 983.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.34 : 3,581.21 = 655.96 : x
  2. Step 2: Convert to fraction form
    2,387.34/3,581.21 = 655.96/x
  3. Step 3: Cross multiply
    2,387.34x = 3,581.21 × 655.96
  4. Step 4: Simplify right side
    2,387.34x = 2,349,130.51
  5. Step 5: Solve for x
    x = 2,349,130.51/2,387.34
  6. Step 6: Final answer
    x = 983.99

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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.