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Finding the Fourth Proportional to 1,562.93, 2,156.87 and 899.90

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Solution

The fourth proportional to 1,562.93, 2,156.87 and 899.90 is: 1,241.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.93 : 2,156.87 = 899.90 : x
  2. Step 2: Convert to fraction form
    1,562.93/2,156.87 = 899.90/x
  3. Step 3: Cross multiply
    1,562.93x = 2,156.87 × 899.90
  4. Step 4: Simplify right side
    1,562.93x = 1,940,967.31
  5. Step 5: Solve for x
    x = 1,940,967.31/1,562.93
  6. Step 6: Final answer
    x = 1,241.88

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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.